18373222564272 has 240 divisors, whose sum is σ = 55527877416960. Its totient is φ = 5653825132032.

The previous prime is 18373222564259. The next prime is 18373222564331. The reversal of 18373222564272 is 27246522237381.

18373222564272 is a `hidden beast` number, since 1 + 8 + 3 + 7 + 3 + 2 + 2 + 2 + 564 + 2 + 72 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 244212453 + ... + 244287675.

It is an arithmetic number, because the mean of its divisors is an integer number (231366155904).

Almost surely, 2^{18373222564272} is an apocalyptic number.

18373222564272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18373222564272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27763938708480).

18373222564272 is an abundant number, since it is smaller than the sum of its proper divisors (37154654852688).

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

18373222564272 is a wasteful number, since it uses less digits than its factorization.

18373222564272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77832 (or 77823 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 54.

The spelling of 18373222564272 in words is "eighteen trillion, three hundred seventy-three billion, two hundred twenty-two million, five hundred sixty-four thousand, two hundred seventy-two".