18126522816 has 56 divisors (see below), whose sum is σ = 50780929680. Its totient is φ = 5686751232.

The previous prime is 18126522809. The next prime is 18126522857. The reversal of 18126522816 is 61822562181.

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, 2773471 + ... + 2779998.

Almost surely, 2^18126522816 is an apocalyptic number.

18126522816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18126522816 is an abundant number, since it is smaller than the sum of its proper divisors (32654406864).

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

18126522816 is a wasteful number, since it uses less digits than its factorization.

18126522816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553501 (or 5553491 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The spelling of 18126522816 in words is "eighteen billion, one hundred twenty-six million, five hundred twenty-two thousand, eight hundred sixteen".