18523660004 has 6 divisors (see below), whose sum is σ = 32416405014. Its totient is φ = 9261830000.

The previous prime is 18523659997. The next prime is 18523660021. The reversal of 18523660004 is 40006632581.

It can be written as a sum of positive squares in only one way, i.e., 10220805604 + 8302854400 = 101098^2 + 91120^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2315457497 + ... + 2315457504.

It is an arithmetic number, because the mean of its divisors is an integer number (5402734169).

Almost surely, 2^18523660004 is an apocalyptic number.

It is an amenable number.

18523660004 is a deficient number, since it is larger than the sum of its proper divisors (13892745010).

18523660004 is a wasteful number, since it uses less digits than its factorization.

18523660004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630915005 (or 4630915003 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 18523660004 in words is "eighteen billion, five hundred twenty-three million, six hundred sixty thousand, four".