18382071980 has 24 divisors (see below), whose sum is σ = 38608330320. Its totient is φ = 7351689920.

The previous prime is 18382071931. The next prime is 18382072031. The reversal of 18382071980 is 8917028381.

It is a super-2 number, since 2×18382071980² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67790 + ... + 203370.

It is an arithmetic number, because the mean of its divisors is an integer number (1608680430).

Almost surely, 2^18382071980 is an apocalyptic number.

18382071980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 135580×135581.

It is an amenable number.

18382071980 is an abundant number, since it is smaller than the sum of its proper divisors (20226258340).

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

18382071980 is a wasteful number, since it uses less digits than its factorization.

18382071980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142369 (or 142367 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The spelling of 18382071980 in words is "eighteen billion, three hundred eighty-two million, seventy-one thousand, nine hundred eighty".