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20473992 = 23337111231
BaseRepresentation
bin100111000011…
…0100010001000
31102112012001000
41032012202020
520220131432
62010455000
7336011640
oct116064210
942465030
1020473992
1110614460
126a34460
13431b0b6
142a0d520
151be657c
hex1386888

20473992 has 128 divisors (see below), whose sum is σ = 70963200. Its totient is φ = 5313600.

The previous prime is 20473949. The next prime is 20473993. The reversal of 20473992 is 29937402.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20473993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16017 + ... + 17247.

It is an arithmetic number, because the mean of its divisors is an integer number (554400).

Almost surely, 220473992 is an apocalyptic number.

20473992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20473992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35481600).

20473992 is an abundant number, since it is smaller than the sum of its proper divisors (50489208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20473992 is a wasteful number, since it uses less digits than its factorization.

20473992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1254 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 20473992 is about 4524.8195544132. The cubic root of 20473992 is about 273.5693948530.

The spelling of 20473992 in words is "twenty million, four hundred seventy-three thousand, nine hundred ninety-two".

Divisors: 1 2 3 4 6 7 8 9 11 12 14 18 21 22 24 27 28 33 36 42 44 54 56 63 66 72 77 84 88 99 108 126 132 154 168 189 198 216 231 252 264 297 308 378 396 462 504 594 616 693 756 792 924 1188 1231 1386 1512 1848 2079 2376 2462 2772 3693 4158 4924 5544 7386 8316 8617 9848 11079 13541 14772 16632 17234 22158 25851 27082 29544 33237 34468 40623 44316 51702 54164 66474 68936 77553 81246 88632 94787 103404 108328 121869 132948 155106 162492 189574 206808 232659 243738 265896 284361 310212 324984 365607 379148 465318 487476 568722 620424 731214 758296 853083 930636 974952 1137444 1462428 1706166 1861272 2274888 2559249 2924856 3412332 5118498 6824664 10236996 20473992