23420721372 has 24 divisors (see below), whose sum is σ = 55544226192. Its totient is φ = 7678924800.

The previous prime is 23420721343. The next prime is 23420721409. The reversal of 23420721372 is 27312702432.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15997029 + ... + 15998492.

It is an arithmetic number, because the mean of its divisors is an integer number (2314342758).

Almost surely, 2^23420721372 is an apocalyptic number.

It is an amenable number.

23420721372 is an abundant number, since it is smaller than the sum of its proper divisors (32123504820).

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

23420721372 is a wasteful number, since it uses less digits than its factorization.

23420721372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31995589 (or 31995587 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 33.

The spelling of 23420721372 in words is "twenty-three billion, four hundred twenty million, seven hundred twenty-one thousand, three hundred seventy-two".