18264447608 has 24 divisors (see below), whose sum is σ = 37642122840. Its totient is φ = 8302021200.

The previous prime is 18264447601. The next prime is 18264447667. The reversal of 18264447608 is 80674446281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18264447601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9433148 + ... + 9435083.

It is an arithmetic number, because the mean of its divisors is an integer number (1568421785).

Almost surely, 2^18264447608 is an apocalyptic number.

It is an amenable number.

18264447608 is an abundant number, since it is smaller than the sum of its proper divisors (19377675232).

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

18264447608 is a wasteful number, since it uses less digits than its factorization.

18264447608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18868259 (or 18868244 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 50.

The spelling of 18264447608 in words is "eighteen billion, two hundred sixty-four million, four hundred forty-seven thousand, six hundred eight".