18223831945872 has 160 divisors (see below), whose sum is σ = 59792968243200. Its totient is φ = 5205843603072.

The previous prime is 18223831945861. The next prime is 18223831946009. The reversal of 18223831945872 is 27854913832281.

18223831945872 is a `hidden beast` number, since 1 + 8 + 2 + 2 + 38 + 3 + 19 + 4 + 587 + 2 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15831013 + ... + 16943099.

It is an arithmetic number, because the mean of its divisors is an integer number (373706051520).

Almost surely, 2^{18223831945872} is an apocalyptic number.

18223831945872 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 18223831945872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29896484121600).

18223831945872 is an abundant number, since it is smaller than the sum of its proper divisors (41569136297328).

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

18223831945872 is a wasteful number, since it uses less digits than its factorization.

18223831945872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117530 (or 1117518 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 18223831945872 in words is "eighteen trillion, two hundred twenty-three billion, eight hundred thirty-one million, nine hundred forty-five thousand, eight hundred seventy-two".