18240445632 has 56 divisors (see below), whose sum is σ = 49818007552. Its totient is φ = 5884012800.

The previous prime is 18240445591. The next prime is 18240445637. The reversal of 18240445632 is 23654404281.

It is not an unprimeable number, because it can be changed into a prime (18240445637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526344 + ... + 1538247.

Almost surely, 2^18240445632 is an apocalyptic number.

18240445632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18240445632 is an abundant number, since it is smaller than the sum of its proper divisors (31577561920).

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

18240445632 is a wasteful number, since it uses less digits than its factorization.

18240445632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064637 (or 3064627 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 18240445632 in words is "eighteen billion, two hundred forty million, four hundred forty-five thousand, six hundred thirty-two".