18346881 has 16 divisors (see below), whose sum is σ = 28313600. Its totient is φ = 10350288.

The previous prime is 18346877. The next prime is 18346883. The reversal of 18346881 is 18864381.

It is not a de Polignac number, because 18346881 - 2² = 18346877 is a prime.

It is a super-2 number, since 2×18346881² = 673216084856322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18346883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3871 + ... + 7188.

It is an arithmetic number, because the mean of its divisors is an integer number (1769600).

Almost surely, 2^18346881 is an apocalyptic number.

It is an amenable number.

18346881 is a deficient number, since it is larger than the sum of its proper divisors (9966719).

18346881 is a wasteful number, since it uses less digits than its factorization.

18346881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11148.

The product of its digits is 36864, while the sum is 39.

The square root of 18346881 is about 4283.3259273607. The cubic root of 18346881 is about 263.7469309257.

The spelling of 18346881 in words is "eighteen million, three hundred forty-six thousand, eight hundred eighty-one".