18518485 has 8 divisors (see below), whose sum is σ = 22246200. Its totient is φ = 14798784.

The previous prime is 18518477. The next prime is 18518503. The reversal of 18518485 is 58481581.

It can be written as a sum of positive squares in 4 ways, for example, as 11168964 + 7349521 = 3342^2 + 2711^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18518485 - 2³ = 18518477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5991 + ... + 8539.

It is an arithmetic number, because the mean of its divisors is an integer number (2780775).

Almost surely, 2^18518485 is an apocalyptic number.

It is an amenable number.

18518485 is a deficient number, since it is larger than the sum of its proper divisors (3727715).

18518485 is a wasteful number, since it uses less digits than its factorization.

18518485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007.

The product of its digits is 51200, while the sum is 40.

The square root of 18518485 is about 4303.3109346177. The cubic root of 18518485 is about 264.5666823726.

The spelling of 18518485 in words is "eighteen million, five hundred eighteen thousand, four hundred eighty-five".