18681462504 has 192 divisors, whose sum is σ = 52818480000. Its totient is φ = 5960148480.

The previous prime is 18681462493. The next prime is 18681462517. The reversal of 18681462504 is 40526418681.

It is a happy number.

18681462504 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 14 + 625 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18681462504.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69447682 + ... + 69447950.

It is an arithmetic number, because the mean of its divisors is an integer number (275096250).

Almost surely, 2^18681462504 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 18681462504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26409240000).

18681462504 is an abundant number, since it is smaller than the sum of its proper divisors (34137017496).

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

18681462504 is a wasteful number, since it uses less digits than its factorization.

18681462504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 18681462504 in words is "eighteen billion, six hundred eighty-one million, four hundred sixty-two thousand, five hundred four".