16804381 has 16 divisors (see below), whose sum is σ = 19692288. Its totient is φ = 14169600.

The previous prime is 16804367. The next prime is 16804397. The reversal of 16804381 is 18340861.

It is a cyclic number.

It is not a de Polignac number, because 16804381 - 2⁵ = 16804349 is a prime.

It is a super-2 number, since 2×16804381² = 564774441586322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16801381) 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, 13036 + ... + 14266.

It is an arithmetic number, because the mean of its divisors is an integer number (1230768).

Almost surely, 2^16804381 is an apocalyptic number.

16804381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16804381 is a deficient number, since it is larger than the sum of its proper divisors (2887907).

16804381 is a wasteful number, since it uses less digits than its factorization.

16804381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 16804381 is about 4099.3146988247. The cubic root of 16804381 is about 256.1380938297.

The spelling of 16804381 in words is "sixteen million, eight hundred four thousand, three hundred eighty-one".