18791310323828 has 48 divisors (see below), whose sum is σ = 37788829338624. Its totient is φ = 8009256499200.

The previous prime is 18791310323809. The next prime is 18791310323867. The reversal of 18791310323828 is 82832301319781.

It is a super-2 number, since 2×18791310323828² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17311901 + ... + 18365307.

It is an arithmetic number, because the mean of its divisors is an integer number (787267277888).

Almost surely, 2^{18791310323828} is an apocalyptic number.

It is an amenable number.

18791310323828 is an abundant number, since it is smaller than the sum of its proper divisors (18997519014796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18791310323828 is a wasteful number, since it uses less digits than its factorization.

18791310323828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056912 (or 1056910 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 18791310323828 in words is "eighteen trillion, seven hundred ninety-one billion, three hundred ten million, three hundred twenty-three thousand, eight hundred twenty-eight".