18001709264 has 80 divisors (see below), whose sum is σ = 43883917440. Its totient is φ = 6949255680.

The previous prime is 18001709213. The next prime is 18001709267. The reversal of 18001709264 is 46290710081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18001709267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67262 + ... + 201314.

It is an arithmetic number, because the mean of its divisors is an integer number (548548968).

Almost surely, 2^18001709264 is an apocalyptic number.

18001709264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18001709264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21941958720).

18001709264 is an abundant number, since it is smaller than the sum of its proper divisors (25882208176).

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

18001709264 is a wasteful number, since it uses less digits than its factorization.

18001709264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134188 (or 134182 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 18001709264 in words is "eighteen billion, one million, seven hundred nine thousand, two hundred sixty-four".