18506814052 has 6 divisors (see below), whose sum is σ = 32386924598. Its totient is φ = 9253407024.

The previous prime is 18506814041. The next prime is 18506814061. The reversal of 18506814052 is 25041860581.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16076718436 + 2430095616 = 126794^2 + 49296^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18506813996 and 18506814014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2313351753 + ... + 2313351760.

Almost surely, 2^18506814052 is an apocalyptic number.

It is an amenable number.

18506814052 is a deficient number, since it is larger than the sum of its proper divisors (13880110546).

18506814052 is a wasteful number, since it uses less digits than its factorization.

18506814052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626703517 (or 4626703515 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The spelling of 18506814052 in words is "eighteen billion, five hundred six million, eight hundred fourteen thousand, fifty-two".