23130720440 has 64 divisors (see below), whose sum is σ = 52237224000. Its totient is φ = 9218040832.

The previous prime is 23130720419. The next prime is 23130720449. The reversal of 23130720440 is 4402703132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23130720449) 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, 22833374 + ... + 22834386.

It is an arithmetic number, because the mean of its divisors is an integer number (816206625).

Almost surely, 2^23130720440 is an apocalyptic number.

23130720440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23130720440 is an abundant number, since it is smaller than the sum of its proper divisors (29106503560).

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

23130720440 is a wasteful number, since it uses less digits than its factorization.

23130720440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576 (or 2572 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The spelling of 23130720440 in words is "twenty-three billion, one hundred thirty million, seven hundred twenty thousand, four hundred forty".