18664958185 has 16 divisors (see below), whose sum is σ = 23241651840. Its totient is φ = 14379281280.

The previous prime is 18664958131. The next prime is 18664958201. The reversal of 18664958185 is 58185946681.

It is not a de Polignac number, because 18664958185 - 2¹⁵ = 18664925417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596100 + ... + 626629.

It is an arithmetic number, because the mean of its divisors is an integer number (1452603240).

Almost surely, 2^18664958185 is an apocalyptic number.

It is an amenable number.

18664958185 is a deficient number, since it is larger than the sum of its proper divisors (4576693655).

18664958185 is a wasteful number, since it uses less digits than its factorization.

18664958185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222848.

The product of its digits is 16588800, while the sum is 61.

The spelling of 18664958185 in words is "eighteen billion, six hundred sixty-four million, nine hundred fifty-eight thousand, one hundred eighty-five".