16620904 has 32 divisors (see below), whose sum is σ = 32872320. Its totient is φ = 7862976.

The previous prime is 16620899. The next prime is 16620911. The reversal of 16620904 is 40902661.

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, 18514 + ... + 19390.

It is an arithmetic number, because the mean of its divisors is an integer number (1027260).

Almost surely, 2^16620904 is an apocalyptic number.

It is an amenable number.

16620904 is a deficient number, since it is larger than the sum of its proper divisors (16251416).

16620904 is a wasteful number, since it uses less digits than its factorization.

16620904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 16620904 is about 4076.8742928866. The cubic root of 16620904 is about 255.2024740738.

The spelling of 16620904 in words is "sixteen million, six hundred twenty thousand, nine hundred four".