18012628864 has 64 divisors (see below), whose sum is σ = 37117457280. Its totient is φ = 8698060800.

The previous prime is 18012628861. The next prime is 18012628873. The reversal of 18012628864 is 46882621081.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18012628861) 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, 2062972 + ... + 2071684.

It is an arithmetic number, because the mean of its divisors is an integer number (579960270).

Almost surely, 2^18012628864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18012628864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18558728640).

18012628864 is an abundant number, since it is smaller than the sum of its proper divisors (19104828416).

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

18012628864 is an equidigital number, since it uses as much as digits as its factorization.

18012628864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9279 (or 9267 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 46.

The spelling of 18012628864 in words is "eighteen billion, twelve million, six hundred twenty-eight thousand, eight hundred sixty-four".