18738233233579 has 2 divisors, whose sum is σ = 18738233233580. Its totient is φ = 18738233233578.

The previous prime is 18738233233541. The next prime is 18738233233627. The reversal of 18738233233579 is 97533233283781.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18738233233579 - 2⁷ = 18738233233451 is a prime.

It is a super-2 number, since 2×18738233233579² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18738233233579.

It is not a weakly prime, because it can be changed into another prime (18738230233579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9369116616789 + 9369116616790.

It is an arithmetic number, because the mean of its divisors is an integer number (9369116616790).

Almost surely, 2^{18738233233579} is an apocalyptic number.

18738233233579 is a deficient number, since it is larger than the sum of its proper divisors (1).

18738233233579 is an equidigital number, since it uses as much as digits as its factorization.

18738233233579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137168640, while the sum is 64.

The spelling of 18738233233579 in words is "eighteen trillion, seven hundred thirty-eight billion, two hundred thirty-three million, two hundred thirty-three thousand, five hundred seventy-nine".