18307688852 has 6 divisors (see below), whose sum is σ = 32038455498. Its totient is φ = 9153844424.

The previous prime is 18307688827. The next prime is 18307688869. The reversal of 18307688852 is 25888670381.

It can be written as a sum of positive squares in only one way, i.e., 9569926276 + 8737762576 = 97826^2 + 93476^2 .

It is a super-2 number, since 2×18307688852² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2288461103 + ... + 2288461110.

It is an arithmetic number, because the mean of its divisors is an integer number (5339742583).

Almost surely, 2^18307688852 is an apocalyptic number.

It is an amenable number.

18307688852 is a deficient number, since it is larger than the sum of its proper divisors (13730766646).

18307688852 is a wasteful number, since it uses less digits than its factorization.

18307688852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576922217 (or 4576922215 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 18307688852 in words is "eighteen billion, three hundred seven million, six hundred eighty-eight thousand, eight hundred fifty-two".