18199980018072 has 48 divisors (see below), whose sum is σ = 49349129183640. Its totient is φ = 6059581035648.

The previous prime is 18199980018071. The next prime is 18199980018083. The reversal of 18199980018072 is 27081008999181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18199980018071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147416418 + ... + 147539825.

Almost surely, 2^{18199980018072} is an apocalyptic number.

18199980018072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18199980018072 is an abundant number, since it is smaller than the sum of its proper divisors (31149149165568).

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

18199980018072 is a wasteful number, since it uses less digits than its factorization.

18199980018072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294957112 (or 294957105 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 63.

The spelling of 18199980018072 in words is "eighteen trillion, one hundred ninety-nine billion, nine hundred eighty million, eighteen thousand, seventy-two".