23404432520 has 48 divisors (see below), whose sum is σ = 61257524940. Its totient is φ = 8024376192.

The previous prime is 23404432507. The next prime is 23404432553. The reversal of 23404432520 is 2523440432.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23376575236 + 27857284 = 152894^2 + 5278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5968559 + ... + 5972478.

Almost surely, 2^23404432520 is an apocalyptic number.

23404432520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23404432520 is an abundant number, since it is smaller than the sum of its proper divisors (37853092420).

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

23404432520 is a wasteful number, since it uses less digits than its factorization.

23404432520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11941062 (or 11941051 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 23404432520 its reverse (2523440432), we get a palindrome (25927872952).

The spelling of 23404432520 in words is "twenty-three billion, four hundred four million, four hundred thirty-two thousand, five hundred twenty".