18312488964 has 192 divisors, whose sum is σ = 59684352000. Its totient is φ = 4756229280.

The previous prime is 18312488963. The next prime is 18312488983. The reversal of 18312488964 is 46988421381.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18312488964.

It is not an unprimeable number, because it can be changed into a prime (18312488963) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 997137 + ... + 1015335.

It is an arithmetic number, because the mean of its divisors is an integer number (310856000).

Almost surely, 2^18312488964 is an apocalyptic number.

18312488964 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 18312488964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29842176000).

18312488964 is an abundant number, since it is smaller than the sum of its proper divisors (41371863036).

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

18312488964 is a wasteful number, since it uses less digits than its factorization.

18312488964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18252 (or 18222 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 18312488964 in words is "eighteen billion, three hundred twelve million, four hundred eighty-eight thousand, nine hundred sixty-four".