18164931 has 8 divisors (see below), whose sum is σ = 25494720. Its totient is φ = 11472552.

The previous prime is 18164929. The next prime is 18164947. The reversal of 18164931 is 13946181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18164931 - 2¹ = 18164929 is a prime.

It is a super-2 number, since 2×18164931² = 659929436469522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18164892 and 18164901.

It is not an unprimeable number, because it can be changed into a prime (18164981) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 159285 + ... + 159398.

It is an arithmetic number, because the mean of its divisors is an integer number (3186840).

Almost surely, 2^18164931 is an apocalyptic number.

18164931 is a deficient number, since it is larger than the sum of its proper divisors (7329789).

18164931 is a wasteful number, since it uses less digits than its factorization.

18164931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318705.

The product of its digits is 5184, while the sum is 33.

The square root of 18164931 is about 4262.0336695057. The cubic root of 18164931 is about 262.8721542225.

The spelling of 18164931 in words is "eighteen million, one hundred sixty-four thousand, nine hundred thirty-one".