18312728896 has 56 divisors (see below), whose sum is σ = 45306179136. Its totient is φ = 7134827520.

The previous prime is 18312728851. The next prime is 18312728897. The reversal of 18312728896 is 69882721381.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18312728897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1853101 + ... + 1862956.

Almost surely, 2^18312728896 is an apocalyptic number.

18312728896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18312728896 is an abundant number, since it is smaller than the sum of its proper divisors (26993450240).

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

18312728896 is a wasteful number, since it uses less digits than its factorization.

18312728896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716087 (or 3716077 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The spelling of 18312728896 in words is "eighteen billion, three hundred twelve million, seven hundred twenty-eight thousand, eight hundred ninety-six".