18105855364 has 27 divisors (see below), whose sum is σ = 33450108741. Its totient is φ = 8574035760.

The previous prime is 18105855311. The next prime is 18105855401. The reversal of 18105855364 is 46355850181.

The square root of 18105855364 is 134558.

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., 7579095364 + 10526760000 = 87058^2 + 102600^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5111434 + ... + 5114974.

Almost surely, 2^18105855364 is an apocalyptic number.

18105855364 is the 134558-th square number.

It is an amenable number.

18105855364 is a deficient number, since it is larger than the sum of its proper divisors (15344253377).

18105855364 is an frugal number, since it uses more digits than its factorization.

18105855364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7124 (or 3562 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 46.

The spelling of 18105855364 in words is "eighteen billion, one hundred five million, eight hundred fifty-five thousand, three hundred sixty-four".