23253440440 has 32 divisors (see below), whose sum is σ = 53036963280. Its totient is φ = 9173958912.

The previous prime is 23253440437. The next prime is 23253440447. The reversal of 23253440440 is 4404435232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23253440447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3978834 + ... + 3984673.

Almost surely, 2^23253440440 is an apocalyptic number.

23253440440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23253440440 is an abundant number, since it is smaller than the sum of its proper divisors (29783522840).

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

23253440440 is a wasteful number, since it uses less digits than its factorization.

23253440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7963591 (or 7963587 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 31.

Adding to 23253440440 its reverse (4404435232), we get a palindrome (27657875672).

The spelling of 23253440440 in words is "twenty-three billion, two hundred fifty-three million, four hundred forty thousand, four hundred forty".