16685268920 has 32 divisors (see below), whose sum is σ = 37546524000. Its totient is φ = 6673277568.

The previous prime is 16685268883. The next prime is 16685268923. The reversal of 16685268920 is 2986258661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16685268923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376997 + ... + 418923.

It is an arithmetic number, because the mean of its divisors is an integer number (1173328875).

Almost surely, 2^16685268920 is an apocalyptic number.

16685268920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16685268920 is an abundant number, since it is smaller than the sum of its proper divisors (20861255080).

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

16685268920 is a wasteful number, since it uses less digits than its factorization.

16685268920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51887 (or 51883 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 16685268920 in words is "sixteen billion, six hundred eighty-five million, two hundred sixty-eight thousand, nine hundred twenty".