18012057 has 24 divisors (see below), whose sum is σ = 29412000. Its totient is φ = 9749376.

The previous prime is 18012047. The next prime is 18012067. The reversal of 18012057 is 75021081.

It is an interprime number because it is at equal distance from previous prime (18012047) and next prime (18012067).

It is not a de Polignac number, because 18012057 - 2⁴ = 18012041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18012017) 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 23 ways as a sum of consecutive naturals, for example, 432 + ... + 6017.

It is an arithmetic number, because the mean of its divisors is an integer number (1225500).

Almost surely, 2^18012057 is an apocalyptic number.

It is an amenable number.

18012057 is a deficient number, since it is larger than the sum of its proper divisors (11399943).

18012057 is a wasteful number, since it uses less digits than its factorization.

18012057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6485 (or 6478 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 18012057 is about 4244.0613803290. The cubic root of 18012057 is about 262.1326416920.

The spelling of 18012057 in words is "eighteen million, twelve thousand, fifty-seven".