18735444732 has 24 divisors (see below), whose sum is σ = 43826164816. Its totient is φ = 6229415808.

The previous prime is 18735444709. The next prime is 18735444737. The reversal of 18735444732 is 23744453781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18735444737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1961593 + ... + 1971120.

Almost surely, 2^18735444732 is an apocalyptic number.

18735444732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18735444732 is an abundant number, since it is smaller than the sum of its proper divisors (25090720084).

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

18735444732 is a wasteful number, since it uses less digits than its factorization.

18735444732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3933117 (or 3933115 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 48.

The spelling of 18735444732 in words is "eighteen billion, seven hundred thirty-five million, four hundred forty-four thousand, seven hundred thirty-two".