18025210564 has 9 divisors (see below), whose sum is σ = 31544588397. Its totient is φ = 9012471024.

The previous prime is 18025210547. The next prime is 18025210597. The reversal of 18025210564 is 46501252081.

It is a happy number.

The square root of 18025210564 is 134258.

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., 12489850564 + 5535360000 = 111758^2 + 74400^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 234952 + ... + 302080.

Almost surely, 2^18025210564 is an apocalyptic number.

18025210564 is the 134258-th square number.

It is an amenable number.

18025210564 is a deficient number, since it is larger than the sum of its proper divisors (13519377833).

18025210564 is an frugal number, since it uses more digits than its factorization.

18025210564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134262 (or 67131 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 18025210564 in words is "eighteen billion, twenty-five million, two hundred ten thousand, five hundred sixty-four".