18605505604 has 27 divisors (see below), whose sum is σ = 37879381407. Its totient is φ = 7972969704.

The previous prime is 18605505593. The next prime is 18605505617. The reversal of 18605505604 is 40650550681.

The square root of 18605505604 is 136402.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1904757 + ... + 1914499.

Almost surely, 2^18605505604 is an apocalyptic number.

18605505604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18605505604 is the 136402-nd square number.

It is an amenable number.

18605505604 is an abundant number, since it is smaller than the sum of its proper divisors (19273875803).

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

18605505604 is an frugal number, since it uses more digits than its factorization.

18605505604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19504 (or 9752 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 18605505604 in words is "eighteen billion, six hundred five million, five hundred five thousand, six hundred four".