23571272440 has 16 divisors (see below), whose sum is σ = 53035363080. Its totient is φ = 9428508960.

The previous prime is 23571272419. The next prime is 23571272443. The reversal of 23571272440 is 4427217532.

It is a self number, because there is not a number n which added to its sum of digits gives 23571272440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23571272443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294640866 + ... + 294640945.

Almost surely, 2^23571272440 is an apocalyptic number.

23571272440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23571272440 is an abundant number, since it is smaller than the sum of its proper divisors (29464090640).

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

23571272440 is a wasteful number, since it uses less digits than its factorization.

23571272440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589281822 (or 589281818 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 37.

Adding to 23571272440 its reverse (4427217532), we get a palindrome (27998489972).

The spelling of 23571272440 in words is "twenty-three billion, five hundred seventy-one million, two hundred seventy-two thousand, four hundred forty".