23439344640 has 88 divisors (see below), whose sum is σ = 74969328000. Its totient is φ = 6250487808.

The previous prime is 23439344639. The next prime is 23439344671. The reversal of 23439344640 is 4644393432.

It is a junction number, because it is equal to n+sod(n) for n = 23439344592 and 23439344601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747640 + ... + 778359.

Almost surely, 2^23439344640 is an apocalyptic number.

23439344640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23439344640 is an abundant number, since it is smaller than the sum of its proper divisors (51529983360).

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

23439344640 is a wasteful number, since it uses less digits than its factorization.

23439344640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526027 (or 1526009 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 42.

The spelling of 23439344640 in words is "twenty-three billion, four hundred thirty-nine million, three hundred forty-four thousand, six hundred forty".