18475183431 has 8 divisors (see below), whose sum is σ = 27370642160. Its totient is φ = 12316788936.

The previous prime is 18475183411. The next prime is 18475183457. The reversal of 18475183431 is 13438157481.

It is not a de Polignac number, because 18475183431 - 2¹³ = 18475175239 is a prime.

It is a super-2 number, since 2×18475183431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18475183411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342133000 + ... + 342133053.

It is an arithmetic number, because the mean of its divisors is an integer number (3421330270).

Almost surely, 2^18475183431 is an apocalyptic number.

18475183431 is a deficient number, since it is larger than the sum of its proper divisors (8895458729).

18475183431 is an equidigital number, since it uses as much as digits as its factorization.

18475183431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684266062 (or 684266056 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 18475183431 in words is "eighteen billion, four hundred seventy-five million, one hundred eighty-three thousand, four hundred thirty-one".