18646448704 has 105 divisors (see below), whose sum is σ = 40485710621. Its totient is φ = 8520844800.

The previous prime is 18646448687. The next prime is 18646448761. The reversal of 18646448704 is 40784464681.

The square root of 18646448704 is 136552.

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

It can be written as a sum of positive squares in 7 ways, for example, as 12870448704 + 5776000000 = 113448^2 + 76000^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 184618254 + ... + 184618354.

Almost surely, 2^18646448704 is an apocalyptic number.

18646448704 is the 136552-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18646448704

18646448704 is an abundant number, since it is smaller than the sum of its proper divisors (21839261917).

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

18646448704 is an frugal number, since it uses more digits than its factorization.

18646448704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 52.

The spelling of 18646448704 in words is "eighteen billion, six hundred forty-six million, four hundred forty-eight thousand, seven hundred four".