16904081931 has 16 divisors (see below), whose sum is σ = 24934065408. Its totient is φ = 10100602400.

The previous prime is 16904081881. The next prime is 16904081939. The reversal of 16904081931 is 13918040961.

It is a cyclic number.

It is not a de Polignac number, because 16904081931 - 2²⁷ = 16769864203 is a prime.

It is a super-2 number, since 2×16904081931² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16904081939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3605016 + ... + 3609701.

It is an arithmetic number, because the mean of its divisors is an integer number (1558379088).

Almost surely, 2^16904081931 is an apocalyptic number.

16904081931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16904081931 is a deficient number, since it is larger than the sum of its proper divisors (8029983477).

16904081931 is a wasteful number, since it uses less digits than its factorization.

16904081931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7214802.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 16904081931 in words is "sixteen billion, nine hundred four million, eighty-one thousand, nine hundred thirty-one".