23405520512 has 64 divisors (see below), whose sum is σ = 50986454400. Its totient is φ = 10613913600.

The previous prime is 23405520451. The next prime is 23405520529. The reversal of 23405520512 is 21502550432.

It is a tau number, because it is divible by the number of its divisors (64).

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, 587564 + ... + 626132.

It is an arithmetic number, because the mean of its divisors is an integer number (796663350).

Almost surely, 2^23405520512 is an apocalyptic number.

23405520512 is a gapful number since it is divisible by the number (22) 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 23405520512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25493227200).

23405520512 is an abundant number, since it is smaller than the sum of its proper divisors (27580933888).

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

23405520512 is a wasteful number, since it uses less digits than its factorization.

23405520512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39025 (or 39013 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 23405520512 in words is "twenty-three billion, four hundred five million, five hundred twenty thousand, five hundred twelve".