18380937072 has 20 divisors (see below), whose sum is σ = 47484087560. Its totient is φ = 6126979008.

The previous prime is 18380937019. The next prime is 18380937073. The reversal of 18380937072 is 27073908381.

It is a super-3 number, since 3×18380937072³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 382936189 = 18380937072 / (1 + 8 + 3 + 8 + 0 + 9 + 3 + 7 + 0 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380937073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191468047 + ... + 191468142.

It is an arithmetic number, because the mean of its divisors is an integer number (2374204378).

Almost surely, 2^18380937072 is an apocalyptic number.

18380937072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18380937072 is an abundant number, since it is smaller than the sum of its proper divisors (29103150488).

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

18380937072 is a wasteful number, since it uses less digits than its factorization.

18380937072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382936200 (or 382936194 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 18380937072 in words is "eighteen billion, three hundred eighty million, nine hundred thirty-seven thousand, seventy-two".