18055392331 has 2 divisors, whose sum is σ = 18055392332. Its totient is φ = 18055392330.

The previous prime is 18055392253. The next prime is 18055392367. The reversal of 18055392331 is 13329355081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18055392331 - 2¹⁵ = 18055359563 is a prime.

It is a super-2 number, since 2×18055392331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18055392391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9027696165 + 9027696166.

It is an arithmetic number, because the mean of its divisors is an integer number (9027696166).

Almost surely, 2^18055392331 is an apocalyptic number.

18055392331 is a deficient number, since it is larger than the sum of its proper divisors (1).

18055392331 is an equidigital number, since it uses as much as digits as its factorization.

18055392331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 18055392331 in words is "eighteen billion, fifty-five million, three hundred ninety-two thousand, three hundred thirty-one".