18456223712 has 12 divisors (see below), whose sum is σ = 36335690496. Its totient is φ = 9228111840.

The previous prime is 18456223711. The next prime is 18456223733. The reversal of 18456223712 is 21732265481.

It is a self number, because there is not a number n which added to its sum of digits gives 18456223712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18456223711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288378464 + ... + 288378527.

It is an arithmetic number, because the mean of its divisors is an integer number (3027974208).

Almost surely, 2^18456223712 is an apocalyptic number.

It is an amenable number.

18456223712 is a deficient number, since it is larger than the sum of its proper divisors (17879466784).

18456223712 is an equidigital number, since it uses as much as digits as its factorization.

18456223712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576757001 (or 576756993 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The spelling of 18456223712 in words is "eighteen billion, four hundred fifty-six million, two hundred twenty-three thousand, seven hundred twelve".