18363801672 has 96 divisors (see below), whose sum is σ = 50720904000. Its totient is φ = 6000179328.

The previous prime is 18363801649. The next prime is 18363801721. The reversal of 18363801672 is 27610836381.

18363801672 is a `hidden beast` number, since 1 + 8 + 3 + 638 + 0 + 1 + 6 + 7 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6802579 + ... + 6805277.

It is an arithmetic number, because the mean of its divisors is an integer number (528342750).

Almost surely, 2^18363801672 is an apocalyptic number.

18363801672 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 18363801672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25360452000).

18363801672 is an abundant number, since it is smaller than the sum of its proper divisors (32357102328).

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

18363801672 is a wasteful number, since it uses less digits than its factorization.

18363801672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547 (or 4540 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 18363801672 in words is "eighteen billion, three hundred sixty-three million, eight hundred one thousand, six hundred seventy-two".