18011252219904 has 224 divisors, whose sum is σ = 53382977958240. Its totient is φ = 6001550032896.

The previous prime is 18011252219887. The next prime is 18011252219911. The reversal of 18011252219904 is 40991225211081.

18011252219904 is a `hidden beast` number, since 1 + 8 + 0 + 112 + 522 + 1 + 9 + 9 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18011252219904.

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, 671722402 + ... + 671749214.

It is an arithmetic number, because the mean of its divisors is an integer number (238316865885).

Almost surely, 2^{18011252219904} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18011252219904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26691488979120).

18011252219904 is an abundant number, since it is smaller than the sum of its proper divisors (35371725738336).

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

18011252219904 is an equidigital number, since it uses as much as digits as its factorization.

18011252219904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29885 (or 29855 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 18011252219904 in words is "eighteen trillion, eleven billion, two hundred fifty-two million, two hundred nineteen thousand, nine hundred four".