18634433157344 has 12 divisors (see below), whose sum is σ = 36686540278584. Its totient is φ = 9317216578656.

The previous prime is 18634433157281. The next prime is 18634433157367. The reversal of 18634433157344 is 44375133443681.

It is a super-2 number, since 2×18634433157344² (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 18634433157344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291163018052 + ... + 291163018115.

It is an arithmetic number, because the mean of its divisors is an integer number (3057211689882).

Almost surely, 2^{18634433157344} is an apocalyptic number.

It is an amenable number.

18634433157344 is a deficient number, since it is larger than the sum of its proper divisors (18052107121240).

18634433157344 is an equidigital number, since it uses as much as digits as its factorization.

18634433157344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582326036177 (or 582326036169 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 56.

The spelling of 18634433157344 in words is "eighteen trillion, six hundred thirty-four billion, four hundred thirty-three million, one hundred fifty-seven thousand, three hundred forty-four".