23179718640 has 320 divisors, whose sum is σ = 78994944000. Its totient is φ = 5588324352.

The previous prime is 23179718623. The next prime is 23179718657. The reversal of 23179718640 is 4681797132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23179718623) and next prime (23179718657).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 23179718640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38697061 + ... + 38697659.

It is an arithmetic number, because the mean of its divisors is an integer number (246859200).

Almost surely, 2^23179718640 is an apocalyptic number.

23179718640 is a gapful number since it is divisible by the number (20) 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 23179718640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39497472000).

23179718640 is an abundant number, since it is smaller than the sum of its proper divisors (55815225360).

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

23179718640 is a wasteful number, since it uses less digits than its factorization.

23179718640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 23179718640 in words is "twenty-three billion, one hundred seventy-nine million, seven hundred eighteen thousand, six hundred forty".