18003136664 has 32 divisors (see below), whose sum is σ = 36046339200. Its totient is φ = 8410805760.

The previous prime is 18003136661. The next prime is 18003136681. The reversal of 18003136664 is 46663130081.

It is a happy number.

It is a super-2 number, since 2×18003136664² (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 (18003136661) 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, 1244417 + ... + 1258800.

It is an arithmetic number, because the mean of its divisors is an integer number (1126448100).

Almost surely, 2^18003136664 is an apocalyptic number.

It is an amenable number.

18003136664 is an abundant number, since it is smaller than the sum of its proper divisors (18043202536).

18003136664 is a wasteful number, since it uses less digits than its factorization.

18003136664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503283 (or 2503279 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 18003136664 in words is "eighteen billion, three million, one hundred thirty-six thousand, six hundred sixty-four".