18115479 has 12 divisors (see below), whose sum is σ = 26205816. Its totient is φ = 12058992.

The previous prime is 18115477. The next prime is 18115519. The reversal of 18115479 is 97451181.

18115479 is a `hidden beast` number, since 181 + 1 + 5 + 479 = 666.

It is not a de Polignac number, because 18115479 - 2¹ = 18115477 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18115477) 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 11 ways as a sum of consecutive naturals, for example, 8124 + ... + 10110.

It is an arithmetic number, because the mean of its divisors is an integer number (2183818).

Almost surely, 2^18115479 is an apocalyptic number.

18115479 is a deficient number, since it is larger than the sum of its proper divisors (8090337).

18115479 is a wasteful number, since it uses less digits than its factorization.

18115479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006 (or 3003 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 18115479 is about 4256.2282598564. The cubic root of 18115479 is about 262.6333907088.

The spelling of 18115479 in words is "eighteen million, one hundred fifteen thousand, four hundred seventy-nine".