18608421807504 has 45 divisors (see below), whose sum is σ = 52077880901163. Its totient is φ = 6202790014176.

The previous prime is 18608421807499. The next prime is 18608421807509. The reversal of 18608421807504 is 40570812480681.

The square root of 18608421807504 is 4313748.

It is a perfect power (a square), and thus also a powerful number.

18608421807504 is a `hidden beast` number, since 1 + 8 + 608 + 4 + 21 + 8 + 0 + 7 + 5 + 0 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (18608421807499) and next prime (18608421807509).

It is not an unprimeable number, because it can be changed into a prime (18608421807509) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 51585237 + ... + 51944715.

Almost surely, 2^{18608421807504} is an apocalyptic number.

18608421807504 is the 4313748-th square number.

It is an amenable number.

18608421807504 is an abundant number, since it is smaller than the sum of its proper divisors (33469459093659).

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

18608421807504 is an frugal number, since it uses more digits than its factorization.

18608421807504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718972 (or 359484 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The spelling of 18608421807504 in words is "eighteen trillion, six hundred eight billion, four hundred twenty-one million, eight hundred seven thousand, five hundred four".