18912108186 has 48 divisors (see below), whose sum is σ = 42376059648. Its totient is φ = 6089428800.

The previous prime is 18912108161. The next prime is 18912108247. The reversal of 18912108186 is 68180121981.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274246 + ... + 336206.

It is an arithmetic number, because the mean of its divisors is an integer number (882834576).

Almost surely, 2^18912108186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18912108186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21188029824).

18912108186 is an abundant number, since it is smaller than the sum of its proper divisors (23463951462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18912108186 is a wasteful number, since it uses less digits than its factorization.

18912108186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62547 (or 62544 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 45.

The spelling of 18912108186 in words is "eighteen billion, nine hundred twelve million, one hundred eight thousand, one hundred eighty-six".