18367486722 has 128 divisors (see below), whose sum is σ = 45097113600. Its totient is φ = 5505579072.

The previous prime is 18367486691. The next prime is 18367486723. The reversal of 18367486722 is 22768476381.

18367486722 is a `hidden beast` number, since 1 + 83 + 67 + 486 + 7 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18367486723) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18684643 + ... + 18685625.

It is an arithmetic number, because the mean of its divisors is an integer number (352321200).

Almost surely, 2^18367486722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18367486722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22548556800).

18367486722 is an abundant number, since it is smaller than the sum of its proper divisors (26729626878).

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

18367486722 is a wasteful number, since it uses less digits than its factorization.

18367486722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669 (or 1663 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 18367486722 in words is "eighteen billion, three hundred sixty-seven million, four hundred eighty-six thousand, seven hundred twenty-two".