18063897604 has 81 divisors (see below), whose sum is σ = 34676988213. Its totient is φ = 8231853696.

The previous prime is 18063897601. The next prime is 18063897617. The reversal of 18063897604 is 40679836081.

It is a happy number.

The square root of 18063897604 is 134402.

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

It can be written as a sum of positive squares in only one way, i.e., 14063588100 + 4000309504 = 118590^2 + 63248^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18063897601) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 269610379 + ... + 269610445.

Almost surely, 2^18063897604 is an apocalyptic number.

18063897604 is the 134402-nd square number.

It is an amenable number.

18063897604 is a deficient number, since it is larger than the sum of its proper divisors (16613090609).

18063897604 is an equidigital number, since it uses as much as digits as its factorization.

18063897604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 18063897604 in words is "eighteen billion, sixty-three million, eight hundred ninety-seven thousand, six hundred four".