18931314967 has 2 divisors, whose sum is σ = 18931314968. Its totient is φ = 18931314966.

The previous prime is 18931314953. The next prime is 18931315009. The reversal of 18931314967 is 76941313981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18931314967 - 2¹¹ = 18931312919 is a prime.

It is a super-2 number, since 2×18931314967² (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 (18931315967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9465657483 + 9465657484.

It is an arithmetic number, because the mean of its divisors is an integer number (9465657484).

Almost surely, 2^18931314967 is an apocalyptic number.

18931314967 is a deficient number, since it is larger than the sum of its proper divisors (1).

18931314967 is an equidigital number, since it uses as much as digits as its factorization.

18931314967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The spelling of 18931314967 in words is "eighteen billion, nine hundred thirty-one million, three hundred fourteen thousand, nine hundred sixty-seven".