10645921920 has 128 divisors (see below), whose sum is σ = 35719992000. Its totient is φ = 2689486848.

The previous prime is 10645921843. The next prime is 10645921943. The reversal of 10645921920 is 2912954601.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×10645921920² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109435 + ... + 182394.

Almost surely, 2^10645921920 is an apocalyptic number.

10645921920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10645921920 is an abundant number, since it is smaller than the sum of its proper divisors (25074070080).

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

10645921920 is a wasteful number, since it uses less digits than its factorization.

10645921920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291870 (or 291858 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 10645921920 in words is "ten billion, six hundred forty-five million, nine hundred twenty-one thousand, nine hundred twenty".