23132561240 has 16 divisors (see below), whose sum is σ = 52048262880. Its totient is φ = 9253024480.

The previous prime is 23132561233. The next prime is 23132561267. The reversal of 23132561240 is 4216523132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289156976 + ... + 289157055.

It is an arithmetic number, because the mean of its divisors is an integer number (3253016430).

Almost surely, 2^23132561240 is an apocalyptic number.

23132561240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23132561240 is an abundant number, since it is smaller than the sum of its proper divisors (28915701640).

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

23132561240 is a wasteful number, since it uses less digits than its factorization.

23132561240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578314042 (or 578314038 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 23132561240 in words is "twenty-three billion, one hundred thirty-two million, five hundred sixty-one thousand, two hundred forty".