23252021440 has 28 divisors (see below), whose sum is σ = 55368876816. Its totient is φ = 9300808448.

The previous prime is 23252021437. The next prime is 23252021453. The reversal of 23252021440 is 4412025232.

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 3 ways as a sum of consecutive naturals, for example, 36330964 + ... + 36331603.

Almost surely, 2^23252021440 is an apocalyptic number.

23252021440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23252021440 is an abundant number, since it is smaller than the sum of its proper divisors (32116855376).

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

23252021440 is an equidigital number, since it uses as much as digits as its factorization.

23252021440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72662584 (or 72662574 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 23252021440 its reverse (4412025232), we get a palindrome (27664046672).

The spelling of 23252021440 in words is "twenty-three billion, two hundred fifty-two million, twenty-one thousand, four hundred forty".