18053139431 has 2 divisors, whose sum is σ = 18053139432. Its totient is φ = 18053139430.

The previous prime is 18053139397. The next prime is 18053139451. The reversal of 18053139431 is 13493135081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18053139431 - 2³⁴ = 873270247 is a prime.

It is a super-2 number, since 2×18053139431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18053139451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9026569715 + 9026569716.

It is an arithmetic number, because the mean of its divisors is an integer number (9026569716).

Almost surely, 2^18053139431 is an apocalyptic number.

18053139431 is a deficient number, since it is larger than the sum of its proper divisors (1).

18053139431 is an equidigital number, since it uses as much as digits as its factorization.

18053139431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 18053139431 in words is "eighteen billion, fifty-three million, one hundred thirty-nine thousand, four hundred thirty-one".