16915920 has 80 divisors (see below), whose sum is σ = 59936640. Its totient is φ = 3866112.

The previous prime is 16915891. The next prime is 16915933. The reversal of 16915920 is 2951961.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×16915920² = 572296698892800, which contains 22 as substring.

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 a congruent number.

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, 3355 + ... + 6714.

It is an arithmetic number, because the mean of its divisors is an integer number (749208).

Almost surely, 2^16915920 is an apocalyptic number.

16915920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16915920 is an abundant number, since it is smaller than the sum of its proper divisors (43020720).

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

16915920 is a wasteful number, since it uses less digits than its factorization.

16915920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10092 (or 10086 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 16915920 is about 4112.8967893688. The cubic root of 16915920 is about 256.7035497305.

The spelling of 16915920 in words is "sixteen million, nine hundred fifteen thousand, nine hundred twenty".