18051137056 has 24 divisors (see below), whose sum is σ = 35541884700. Its totient is φ = 9024626688.

The previous prime is 18051137051. The next prime is 18051137063. The reversal of 18051137056 is 65073115081.

It can be written as a sum of positive squares in 2 ways, for example, as 17130621456 + 920515600 = 130884^2 + 30340^2 .

It is not an unprimeable number, because it can be changed into a prime (18051137051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362160 + ... + 408976.

Almost surely, 2^18051137056 is an apocalyptic number.

18051137056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18051137056 is a deficient number, since it is larger than the sum of its proper divisors (17490747644).

18051137056 is a wasteful number, since it uses less digits than its factorization.

18051137056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58876 (or 58868 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 18051137056 in words is "eighteen billion, fifty-one million, one hundred thirty-seven thousand, fifty-six".