18723606216 has 64 divisors (see below), whose sum is σ = 53557438080. Its totient is φ = 5343459840.

The previous prime is 18723606179. The next prime is 18723606227. The reversal of 18723606216 is 61260632781.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83796 + ... + 210876.

It is an arithmetic number, because the mean of its divisors is an integer number (836834970).

Almost surely, 2^18723606216 is an apocalyptic number.

It is an amenable number.

18723606216 is an abundant number, since it is smaller than the sum of its proper divisors (34833831864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18723606216 is a wasteful number, since it uses less digits than its factorization.

18723606216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127974 (or 127970 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 18723606216 in words is "eighteen billion, seven hundred twenty-three million, six hundred six thousand, two hundred sixteen".