18131468 has 12 divisors (see below), whose sum is σ = 31925880. Its totient is φ = 9009792.

The previous prime is 18131431. The next prime is 18131479. The reversal of 18131468 is 86413181.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13253 + ... + 14556.

It is an arithmetic number, because the mean of its divisors is an integer number (2660490).

Almost surely, 2^18131468 is an apocalyptic number.

It is an amenable number.

18131468 is a deficient number, since it is larger than the sum of its proper divisors (13794412).

18131468 is a wasteful number, since it uses less digits than its factorization.

18131468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27976 (or 27974 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 18131468 is about 4258.1061518004. The cubic root of 18131468 is about 262.7106360754.

The spelling of 18131468 in words is "eighteen million, one hundred thirty-one thousand, four hundred sixty-eight".