18012489264 has 640 divisors, whose sum is σ = 69655541760. Its totient is φ = 4313088000.

The previous prime is 18012489263. The next prime is 18012489289. The reversal of 18012489264 is 46298421081.

It is not an unprimeable number, because it can be changed into a prime (18012489263) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 29970564 + ... + 29971164.

It is an arithmetic number, because the mean of its divisors is an integer number (108836784).

Almost surely, 2^18012489264 is an apocalyptic number.

18012489264 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 18012489264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34827770880).

18012489264 is an abundant number, since it is smaller than the sum of its proper divisors (51643052496).

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

18012489264 is a wasteful number, since it uses less digits than its factorization.

18012489264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 18012489264 in words is "eighteen billion, twelve million, four hundred eighty-nine thousand, two hundred sixty-four".