18405452244 has 12 divisors (see below), whose sum is σ = 42946055264. Its totient is φ = 6135150744.

The previous prime is 18405452227. The next prime is 18405452251. The reversal of 18405452244 is 44225450481.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766893832 + ... + 766893855.

Almost surely, 2^18405452244 is an apocalyptic number.

It is an amenable number.

18405452244 is an abundant number, since it is smaller than the sum of its proper divisors (24540603020).

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

18405452244 is a wasteful number, since it uses less digits than its factorization.

18405452244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533787694 (or 1533787692 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 39.

The spelling of 18405452244 in words is "eighteen billion, four hundred five million, four hundred fifty-two thousand, two hundred forty-four".