18722423600939 has 2 divisors, whose sum is σ = 18722423600940. Its totient is φ = 18722423600938.

The previous prime is 18722423600897. The next prime is 18722423600953. The reversal of 18722423600939 is 93900632422781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18722423600939 - 2¹² = 18722423596843 is a prime.

It is not a weakly prime, because it can be changed into another prime (18722423600999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9361211800469 + 9361211800470.

It is an arithmetic number, because the mean of its divisors is an integer number (9361211800470).

Almost surely, 2^{18722423600939} is an apocalyptic number.

18722423600939 is a deficient number, since it is larger than the sum of its proper divisors (1).

18722423600939 is an equidigital number, since it uses as much as digits as its factorization.

18722423600939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 18722423600939 in words is "eighteen trillion, seven hundred twenty-two billion, four hundred twenty-three million, six hundred thousand, nine hundred thirty-nine".