18022380931 has 2 divisors, whose sum is σ = 18022380932. Its totient is φ = 18022380930.

The previous prime is 18022380923. The next prime is 18022380953. The reversal of 18022380931 is 13908322081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18022380931 - 2³ = 18022380923 is a prime.

It is a super-2 number, since 2×18022380931² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18022384931) 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, 9011190465 + 9011190466.

It is an arithmetic number, because the mean of its divisors is an integer number (9011190466).

Almost surely, 2^18022380931 is an apocalyptic number.

18022380931 is a deficient number, since it is larger than the sum of its proper divisors (1).

18022380931 is an equidigital number, since it uses as much as digits as its factorization.

18022380931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 18022380931 in words is "eighteen billion, twenty-two million, three hundred eighty thousand, nine hundred thirty-one".