23920336640640 has 512 divisors, whose sum is σ = 89514188225280. Its totient is φ = 5368283136000.

The previous prime is 23920336640639. The next prime is 23920336640731. The reversal of 23920336640640 is 4604663302932.

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 23920336640640.

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, 21355350 + ... + 22447530.

Almost surely, 2^{23920336640640} is an apocalyptic number.

23920336640640 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 23920336640640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44757094112640).

23920336640640 is an abundant number, since it is smaller than the sum of its proper divisors (65593851584640).

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

23920336640640 is a wasteful number, since it uses less digits than its factorization.

23920336640640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092292 (or 1092280 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 48.

The spelling of 23920336640640 in words is "twenty-three trillion, nine hundred twenty billion, three hundred thirty-six million, six hundred forty thousand, six hundred forty".