18361839732 has 24 divisors (see below), whose sum is σ = 42846506976. Its totient is φ = 6120296928.

The previous prime is 18361839719. The next prime is 18361839733. The reversal of 18361839732 is 23793816381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18361839733) 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, 382623 + ... + 427929.

It is an arithmetic number, because the mean of its divisors is an integer number (1785271124).

Almost surely, 2^18361839732 is an apocalyptic number.

18361839732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18361839732 is an abundant number, since it is smaller than the sum of its proper divisors (24484667244).

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

18361839732 is a wasteful number, since it uses less digits than its factorization.

18361839732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79087 (or 79085 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The spelling of 18361839732 in words is "eighteen billion, three hundred sixty-one million, eight hundred thirty-nine thousand, seven hundred thirty-two".