18015226664 has 32 divisors (see below), whose sum is σ = 35021894400. Its totient is φ = 8678616960.

The previous prime is 18015226627. The next prime is 18015226667. The reversal of 18015226664 is 46662251081.

It is not an unprimeable number, because it can be changed into a prime (18015226667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103709 + ... + 216300.

It is an arithmetic number, because the mean of its divisors is an integer number (1094434200).

Almost surely, 2^18015226664 is an apocalyptic number.

It is an amenable number.

18015226664 is a deficient number, since it is larger than the sum of its proper divisors (17006667736).

18015226664 is a wasteful number, since it uses less digits than its factorization.

18015226664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320273 (or 320269 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 18015226664 in words is "eighteen billion, fifteen million, two hundred twenty-six thousand, six hundred sixty-four".