23431532440 has 64 divisors (see below), whose sum is σ = 55035106560. Its totient is φ = 8961532800.

The previous prime is 23431532401. The next prime is 23431532459. The reversal of 23431532440 is 4423513432.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4143615 + ... + 4149265.

It is an arithmetic number, because the mean of its divisors is an integer number (859923540).

Almost surely, 2^23431532440 is an apocalyptic number.

23431532440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23431532440 is an abundant number, since it is smaller than the sum of its proper divisors (31603574120).

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

23431532440 is a wasteful number, since it uses less digits than its factorization.

23431532440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10192 (or 10188 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 31.

The spelling of 23431532440 in words is "twenty-three billion, four hundred thirty-one million, five hundred thirty-two thousand, four hundred forty".