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20373990 = 23571317439
BaseRepresentation
bin100110110111…
…0000111100110
31102100002212020
41031232013212
520203431430
62004404010
7335114250
oct115560746
942302766
1020373990
111055630a
1269a6606
1342b4720
1429c4cd0
151bc6b10
hex136e1e6

20373990 has 128 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 4036608.

The previous prime is 20373971. The next prime is 20374027. The reversal of 20373990 is 9937302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46191 + ... + 46629.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 220373990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20373990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31933440).

20373990 is an abundant number, since it is smaller than the sum of its proper divisors (43492890).

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

20373990 is a wasteful number, since it uses less digits than its factorization.

20373990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 10206, while the sum is 33.

The square root of 20373990 is about 4513.7556424778. The cubic root of 20373990 is about 273.1232654579.

The spelling of 20373990 in words is "twenty million, three hundred seventy-three thousand, nine hundred ninety".

Divisors: 1 2 3 5 6 7 10 13 14 15 17 21 26 30 34 35 39 42 51 65 70 78 85 91 102 105 119 130 170 182 195 210 221 238 255 273 357 390 439 442 455 510 546 595 663 714 878 910 1105 1190 1317 1326 1365 1547 1785 2195 2210 2634 2730 3073 3094 3315 3570 4390 4641 5707 6146 6585 6630 7463 7735 9219 9282 11414 13170 14926 15365 15470 17121 18438 22389 23205 28535 30730 34242 37315 39949 44778 46095 46410 52241 57070 74630 79898 85605 92190 97019 104482 111945 119847 156723 171210 194038 199745 223890 239694 261205 291057 313446 399490 485095 522410 582114 599235 679133 783615 970190 1198470 1358266 1455285 1567230 2037399 2910570 3395665 4074798 6791330 10186995 20373990