23505132440 has 64 divisors (see below), whose sum is σ = 56090784960. Its totient is φ = 8845816320.

The previous prime is 23505132439. The next prime is 23505132481. The reversal of 23505132440 is 4423150532.

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 15 ways as a sum of consecutive naturals, for example, 153299 + ... + 265538.

It is an arithmetic number, because the mean of its divisors is an integer number (876418515).

Almost surely, 2^23505132440 is an apocalyptic number.

23505132440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23505132440 is an abundant number, since it is smaller than the sum of its proper divisors (32585652520).

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

23505132440 is a wasteful number, since it uses less digits than its factorization.

23505132440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418932 (or 418928 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 23505132440 its reverse (4423150532), we get a palindrome (27928282972).

The spelling of 23505132440 in words is "twenty-three billion, five hundred five million, one hundred thirty-two thousand, four hundred forty".