18467559668 has 6 divisors (see below), whose sum is σ = 32318229426. Its totient is φ = 9233779832.

The previous prime is 18467559667. The next prime is 18467559679. The reversal of 18467559668 is 86695576481.

It can be written as a sum of positive squares in only one way, i.e., 11187715984 + 7279843684 = 105772^2 + 85322^2 .

It is a super-2 number, since 2×18467559668² (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 (18467559667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2308444955 + ... + 2308444962.

It is an arithmetic number, because the mean of its divisors is an integer number (5386371571).

Almost surely, 2^18467559668 is an apocalyptic number.

It is an amenable number.

18467559668 is a deficient number, since it is larger than the sum of its proper divisors (13850669758).

18467559668 is a wasteful number, since it uses less digits than its factorization.

18467559668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616889921 (or 4616889919 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 65.

The spelling of 18467559668 in words is "eighteen billion, four hundred sixty-seven million, five hundred fifty-nine thousand, six hundred sixty-eight".