18455013 has 32 divisors (see below), whose sum is σ = 29905920. Its totient is φ = 11197440.

The previous prime is 18455009. The next prime is 18455027. The reversal of 18455013 is 31055481.

It is not a de Polignac number, because 18455013 - 2² = 18455009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18455033) 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 31 ways as a sum of consecutive naturals, for example, 13581 + ... + 14877.

It is an arithmetic number, because the mean of its divisors is an integer number (934560).

Almost surely, 2^18455013 is an apocalyptic number.

It is an amenable number.

18455013 is a deficient number, since it is larger than the sum of its proper divisors (11450907).

18455013 is a wasteful number, since it uses less digits than its factorization.

18455013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 18455013 is about 4295.9298178625. The cubic root of 18455013 is about 264.2640694507.

The spelling of 18455013 in words is "eighteen million, four hundred fifty-five thousand, thirteen".