18404178244 has 27 divisors (see below), whose sum is σ = 33370472317. Its totient is φ = 8880977168.

The previous prime is 18404178229. The next prime is 18404178253. The reversal of 18404178244 is 44287140481.

The square root of 18404178244 is 135662.

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., 9650704644 + 8753473600 = 98238^2 + 93560^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18404178244.

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, 7867227 + ... + 7869565.

Almost surely, 2^18404178244 is an apocalyptic number.

18404178244 is the 135662-nd square number.

It is an amenable number.

18404178244 is a deficient number, since it is larger than the sum of its proper divisors (14966294073).

18404178244 is an frugal number, since it uses more digits than its factorization.

18404178244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740 (or 2370 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 43.

The spelling of 18404178244 in words is "eighteen billion, four hundred four million, one hundred seventy-eight thousand, two hundred forty-four".