18157512 has 16 divisors (see below), whose sum is σ = 45393840. Its totient is φ = 6052496.

The previous prime is 18157507. The next prime is 18157523. The reversal of 18157512 is 21575181.

It is a self number, because there is not a number n which added to its sum of digits gives 18157512.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 378258 + ... + 378305.

It is an arithmetic number, because the mean of its divisors is an integer number (2837115).

Almost surely, 2^18157512 is an apocalyptic number.

18157512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18157512 is an abundant number, since it is smaller than the sum of its proper divisors (27236328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18157512 is a wasteful number, since it uses less digits than its factorization.

18157512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756572 (or 756568 counting only the distinct ones).

The product of its digits is 2800, while the sum is 30.

The square root of 18157512 is about 4261.1632214690. The cubic root of 18157512 is about 262.8363615536.

The spelling of 18157512 in words is "eighteen million, one hundred fifty-seven thousand, five hundred twelve".