18132915 has 16 divisors (see below), whose sum is σ = 29069568. Its totient is φ = 9651936.

The previous prime is 18132899. The next prime is 18132937. The reversal of 18132915 is 51923181.

It is not a de Polignac number, because 18132915 - 2⁴ = 18132899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10332 + ... + 11958.

It is an arithmetic number, because the mean of its divisors is an integer number (1816848).

Almost surely, 2^18132915 is an apocalyptic number.

18132915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18132915 is a deficient number, since it is larger than the sum of its proper divisors (10936653).

18132915 is a wasteful number, since it uses less digits than its factorization.

18132915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378.

The product of its digits is 2160, while the sum is 30.

The square root of 18132915 is about 4258.2760596279. The cubic root of 18132915 is about 262.7176245181.

The spelling of 18132915 in words is "eighteen million, one hundred thirty-two thousand, nine hundred fifteen".