18542228185 has 32 divisors (see below), whose sum is σ = 25389141120. Its totient is φ = 12878466048.

The previous prime is 18542228149. The next prime is 18542228233. The reversal of 18542228185 is 58182224581.

It is a cyclic number.

It is not a de Polignac number, because 18542228185 - 2⁹ = 18542227673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1899046 + ... + 1908784.

It is an arithmetic number, because the mean of its divisors is an integer number (793410660).

Almost surely, 2^18542228185 is an apocalyptic number.

It is an amenable number.

18542228185 is a deficient number, since it is larger than the sum of its proper divisors (6846912935).

18542228185 is a wasteful number, since it uses less digits than its factorization.

18542228185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11497.

The product of its digits is 409600, while the sum is 46.

The spelling of 18542228185 in words is "eighteen billion, five hundred forty-two million, two hundred twenty-eight thousand, one hundred eighty-five".