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19425920 = 275127239
BaseRepresentation
bin100101000011…
…0101010000000
31100112221100112
41022012222000
514433112140
61532210452
7324055223
oct112065200
940487315
1019425920
11aa68a88
126609a28
134042037
1428195ba
151a8ac65
hex1286a80

19425920 has 64 divisors (see below), whose sum is σ = 47001600. Its totient is φ = 7676928.

The previous prime is 19425919. The next prime is 19425947. The reversal of 19425920 is 2952491.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81161 + ... + 81399.

It is an arithmetic number, because the mean of its divisors is an integer number (734400).

Almost surely, 219425920 is an apocalyptic number.

19425920 is a gapful number since it is divisible by the number (10) 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 19425920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23500800).

19425920 is an abundant number, since it is smaller than the sum of its proper divisors (27575680).

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

19425920 is a wasteful number, since it uses less digits than its factorization.

19425920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 19425920 is about 4407.4845433648. The cubic root of 19425920 is about 268.8193532929.

The spelling of 19425920 in words is "nineteen million, four hundred twenty-five thousand, nine hundred twenty".

Divisors: 1 2 4 5 8 10 16 20 32 40 64 80 127 128 160 239 254 320 478 508 635 640 956 1016 1195 1270 1912 2032 2390 2540 3824 4064 4780 5080 7648 8128 9560 10160 15296 16256 19120 20320 30353 30592 38240 40640 60706 76480 81280 121412 151765 152960 242824 303530 485648 607060 971296 1214120 1942592 2428240 3885184 4856480 9712960 19425920