16981804 has 12 divisors (see below), whose sum is σ = 33963664. Its totient is φ = 7277904.

The previous prime is 16981787. The next prime is 16981813. The reversal of 16981804 is 40818961.

It is a happy number.

16981804 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303219 + ... + 303274.

Almost surely, 2^16981804 is an apocalyptic number.

16981804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16981804 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16981804 is a wasteful number, since it uses less digits than its factorization.

16981804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606504 (or 606502 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 16981804 is about 4120.8984457276. The cubic root of 16981804 is about 257.0363870214.

The spelling of 16981804 in words is "sixteen million, nine hundred eighty-one thousand, eight hundred four".