18512313 has 8 divisors (see below), whose sum is σ = 25208448. Its totient is φ = 12078864.

The previous prime is 18512297. The next prime is 18512323. The reversal of 18512313 is 31321581.

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

It is not a de Polignac number, because 18512313 - 2⁴ = 18512297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18512323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65506 + ... + 65787.

It is an arithmetic number, because the mean of its divisors is an integer number (3151056).

Almost surely, 2^18512313 is an apocalyptic number.

It is an amenable number.

18512313 is a deficient number, since it is larger than the sum of its proper divisors (6696135).

18512313 is a wasteful number, since it uses less digits than its factorization.

18512313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131343.

The product of its digits is 720, while the sum is 24.

The square root of 18512313 is about 4302.5937526102. The cubic root of 18512313 is about 264.5372867533.

Adding to 18512313 its reverse (31321581), we get a palindrome (49833894).

It can be divided in two parts, 185123 and 13, that added together give a triangular number (185136 = T₆₀₈).

The spelling of 18512313 in words is "eighteen million, five hundred twelve thousand, three hundred thirteen".