16690920 has 32 divisors (see below), whose sum is σ = 50073120. Its totient is φ = 4450880.

The previous prime is 16690913. The next prime is 16690963. The reversal of 16690920 is 2909661.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 69426 + ... + 69665.

It is an arithmetic number, because the mean of its divisors is an integer number (1564785).

Almost surely, 2^16690920 is an apocalyptic number.

16690920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16690920 is an abundant number, since it is smaller than the sum of its proper divisors (33382200).

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

16690920 is a wasteful number, since it uses less digits than its factorization.

16690920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139105 (or 139101 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 16690920 is about 4085.4522393488. The cubic root of 16690920 is about 255.5603211322.

The spelling of 16690920 in words is "sixteen million, six hundred ninety thousand, nine hundred twenty".