18081188053836 has 24 divisors (see below), whose sum is σ = 42195774680640. Its totient is φ = 6026157557712.

The previous prime is 18081188053829. The next prime is 18081188053889. The reversal of 18081188053836 is 63835088118081.

It is a super-2 number, since 2×18081188053836² (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 18081188053836.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113057626 + ... + 113217441.

It is an arithmetic number, because the mean of its divisors is an integer number (1758157278360).

Almost surely, 2^{18081188053836} is an apocalyptic number.

It is an amenable number.

18081188053836 is an abundant number, since it is smaller than the sum of its proper divisors (24114586626804).

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

18081188053836 is a wasteful number, since it uses less digits than its factorization.

18081188053836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226281733 (or 226281731 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 60.

The spelling of 18081188053836 in words is "eighteen trillion, eighty-one billion, one hundred eighty-eight million, fifty-three thousand, eight hundred thirty-six".