18367336806 has 64 divisors (see below), whose sum is σ = 45411383808. Its totient is φ = 4822760448.

The previous prime is 18367336783. The next prime is 18367336807. The reversal of 18367336806 is 60863376381.

It is a happy number.

It is a super-2 number, since 2×18367336806² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18367336807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49846 + ... + 198038.

It is an arithmetic number, because the mean of its divisors is an integer number (709552872).

Almost surely, 2^18367336806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18367336806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22705691904).

18367336806 is an abundant number, since it is smaller than the sum of its proper divisors (27044047002).

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

18367336806 is a wasteful number, since it uses less digits than its factorization.

18367336806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148445.

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 18367336806 in words is "eighteen billion, three hundred sixty-seven million, three hundred thirty-six thousand, eight hundred six".