20118822418251 has 12 divisors (see below), whose sum is σ = 29769314473080. Its totient is φ = 13085412954720.

The previous prime is 20118822418243. The next prime is 20118822418327. The reversal of 20118822418251 is 15281422881102.

20118822418251 is a `hidden beast` number, since 2 + 0 + 1 + 188 + 2 + 2 + 418 + 2 + 51 = 666.

It is not a de Polignac number, because 20118822418251 - 2³ = 20118822418243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20118822418197 and 20118822418206.

It is not an unprimeable number, because it can be changed into a prime (20118822418351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27261276621 + ... + 27261277358.

It is an arithmetic number, because the mean of its divisors is an integer number (2480776206090).

Almost surely, 2^{20118822418251} is an apocalyptic number.

20118822418251 is a deficient number, since it is larger than the sum of its proper divisors (9650492054829).

20118822418251 is a wasteful number, since it uses less digits than its factorization.

20118822418251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54522554026 (or 54522554023 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 45.

The spelling of 20118822418251 in words is "twenty trillion, one hundred eighteen billion, eight hundred twenty-two million, four hundred eighteen thousand, two hundred fifty-one".