18164419 has 32 divisors (see below), whose sum is σ = 23740416. Its totient is φ = 13512960.

The previous prime is 18164413. The next prime is 18164431. The reversal of 18164419 is 91446181.

It is a cyclic number.

It is not a de Polignac number, because 18164419 - 2⁵ = 18164387 is a prime.

It is a super-2 number, since 2×18164419² = 659892235215122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18164413) 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 31 ways as a sum of consecutive naturals, for example, 132519 + ... + 132655.

It is an arithmetic number, because the mean of its divisors is an integer number (741888).

Almost surely, 2^18164419 is an apocalyptic number.

18164419 is a deficient number, since it is larger than the sum of its proper divisors (5575997).

18164419 is a wasteful number, since it uses less digits than its factorization.

18164419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235.

The product of its digits is 6912, while the sum is 34.

The square root of 18164419 is about 4261.9736038601. The cubic root of 18164419 is about 262.8696844121.

The spelling of 18164419 in words is "eighteen million, one hundred sixty-four thousand, four hundred nineteen".