18674831431 has 2 divisors, whose sum is σ = 18674831432. Its totient is φ = 18674831430.

The previous prime is 18674831419. The next prime is 18674831471. The reversal of 18674831431 is 13413847681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18674831431 - 2¹⁹ = 18674307143 is a prime.

It is a super-2 number, since 2×18674831431² (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 (18674831471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9337415715 + 9337415716.

It is an arithmetic number, because the mean of its divisors is an integer number (9337415716).

Almost surely, 2^18674831431 is an apocalyptic number.

18674831431 is a deficient number, since it is larger than the sum of its proper divisors (1).

18674831431 is an equidigital number, since it uses as much as digits as its factorization.

18674831431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The spelling of 18674831431 in words is "eighteen billion, six hundred seventy-four million, eight hundred thirty-one thousand, four hundred thirty-one".