18744468307931 has 2 divisors, whose sum is σ = 18744468307932. Its totient is φ = 18744468307930.

The previous prime is 18744468307897. The next prime is 18744468307933. The reversal of 18744468307931 is 13970386444781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18744468307931 - 2⁶ = 18744468307867 is a prime.

It is a super-2 number, since 2×18744468307931² (a number of 27 digits) contains 22 as substring.

Together with 18744468307933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18744468307933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9372234153965 + 9372234153966.

It is an arithmetic number, because the mean of its divisors is an integer number (9372234153966).

Almost surely, 2^{18744468307931} is an apocalyptic number.

18744468307931 is a deficient number, since it is larger than the sum of its proper divisors (1).

18744468307931 is an equidigital number, since it uses as much as digits as its factorization.

18744468307931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97542144, while the sum is 65.

The spelling of 18744468307931 in words is "eighteen trillion, seven hundred forty-four billion, four hundred sixty-eight million, three hundred seven thousand, nine hundred thirty-one".