18287019108 has 30 divisors (see below), whose sum is σ = 47805881046. Its totient is φ = 6095672928.

The previous prime is 18287019097. The next prime is 18287019169. The reversal of 18287019108 is 80191078281.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12843235584 + 5443783524 = 113328^2 + 73782^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 28220385 + ... + 28221032.

Almost surely, 2^18287019108 is an apocalyptic number.

18287019108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18287019108 is an abundant number, since it is smaller than the sum of its proper divisors (29518861938).

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

18287019108 is a wasteful number, since it uses less digits than its factorization.

18287019108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56441433 (or 56441422 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The spelling of 18287019108 in words is "eighteen billion, two hundred eighty-seven million, nineteen thousand, one hundred eight".