18475427457 has 20 divisors (see below), whose sum is σ = 27611834580. Its totient is φ = 12311266464.

The previous prime is 18475427441. The next prime is 18475427471. The reversal of 18475427457 is 75472457481.

18475427457 is a `hidden beast` number, since 1 + 8 + 47 + 542 + 7 + 4 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17458072641 + 1017354816 = 132129^2 + 31896^2 .

It is not a de Polignac number, because 18475427457 - 2⁴ = 18475427441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18475427057) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 127719 + ... + 230787.

It is an arithmetic number, because the mean of its divisors is an integer number (1380591729).

Almost surely, 2^18475427457 is an apocalyptic number.

It is an amenable number.

18475427457 is a deficient number, since it is larger than the sum of its proper divisors (9136407123).

18475427457 is a wasteful number, since it uses less digits than its factorization.

18475427457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105294 (or 105285 counting only the distinct ones).

The product of its digits is 8780800, while the sum is 54.

The spelling of 18475427457 in words is "eighteen billion, four hundred seventy-five million, four hundred twenty-seven thousand, four hundred fifty-seven".