18155258104 has 32 divisors (see below), whose sum is σ = 35534183040. Its totient is φ = 8679765600.

The previous prime is 18155258059. The next prime is 18155258123. The reversal of 18155258104 is 40185255181.

It is a happy number.

It is a super-2 number, since 2×18155258104² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 530059 + ... + 563269.

It is an arithmetic number, because the mean of its divisors is an integer number (1110443220).

Almost surely, 2^18155258104 is an apocalyptic number.

It is an amenable number.

18155258104 is a deficient number, since it is larger than the sum of its proper divisors (17378924936).

18155258104 is a wasteful number, since it uses less digits than its factorization.

18155258104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36211 (or 36207 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 40.

The spelling of 18155258104 in words is "eighteen billion, one hundred fifty-five million, two hundred fifty-eight thousand, one hundred four".