10255704921 has 96 divisors (see below), whose sum is σ = 19772153856. Its totient is φ = 5155488000.

The previous prime is 10255704919. The next prime is 10255704929. The reversal of 10255704921 is 12940755201.

10255704921 is a `hidden beast` number, since 1 + 0 + 25 + 570 + 49 + 21 = 666.

It is not a de Polignac number, because 10255704921 - 2¹ = 10255704919 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10255704929) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 571201 + ... + 588881.

It is an arithmetic number, because the mean of its divisors is an integer number (205959936).

Almost surely, 2^10255704921 is an apocalyptic number.

10255704921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10255704921 is a deficient number, since it is larger than the sum of its proper divisors (9516448935).

10255704921 is a wasteful number, since it uses less digits than its factorization.

10255704921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17745 (or 17733 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 10255704921 in words is "ten billion, two hundred fifty-five million, seven hundred four thousand, nine hundred twenty-one".