18474444372 has 24 divisors (see below), whose sum is σ = 43115800000. Its totient is φ = 6156896256.

The previous prime is 18474444371. The next prime is 18474444379. The reversal of 18474444372 is 27344447481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18474444371) 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, 93997 + ... + 213972.

Almost surely, 2^18474444372 is an apocalyptic number.

18474444372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18474444372 is an abundant number, since it is smaller than the sum of its proper divisors (24641355628).

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

18474444372 is a wasteful number, since it uses less digits than its factorization.

18474444372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312975 (or 312973 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 48.

The spelling of 18474444372 in words is "eighteen billion, four hundred seventy-four million, four hundred forty-four thousand, three hundred seventy-two".