18344474472025 has 81 divisors (see below), whose sum is σ = 24870433752957. Its totient is φ = 13416552801600.

The previous prime is 18344474472017. The next prime is 18344474472041. The reversal of 18344474472025 is 52027447444381.

The square root of 18344474472025 is 4283045.

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

It can be written as a sum of positive squares in 4 ways, for example, as 4728315431961 + 13616159040064 = 2174469^2 + 3690008^2 .

It is not a de Polignac number, because 18344474472025 - 2³ = 18344474472017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 36470127924 + ... + 36470128426.

Almost surely, 2^{18344474472025} is an apocalyptic number.

18344474472025 is the 4283045-th square number.

18344474472025 is the 2141523-rd centered octagonal number.

It is an amenable number.

18344474472025 is a deficient number, since it is larger than the sum of its proper divisors (6525959280932).

18344474472025 is an frugal number, since it uses more digits than its factorization.

18344474472025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 55.

The spelling of 18344474472025 in words is "eighteen trillion, three hundred forty-four billion, four hundred seventy-four million, four hundred seventy-two thousand, twenty-five".