23553445240 has 64 divisors (see below), whose sum is σ = 57258099360. Its totient is φ = 8668270080.

The previous prime is 23553445211. The next prime is 23553445249. The reversal of 23553445240 is 4254435532.

It is a self number, because there is not a number n which added to its sum of digits gives 23553445240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23553445249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85870 + ... + 233410.

Almost surely, 2^23553445240 is an apocalyptic number.

23553445240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23553445240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28629049680).

23553445240 is an abundant number, since it is smaller than the sum of its proper divisors (33704654120).

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

23553445240 is a wasteful number, since it uses less digits than its factorization.

23553445240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147872 (or 147868 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 37.

The spelling of 23553445240 in words is "twenty-three billion, five hundred fifty-three million, four hundred forty-five thousand, two hundred forty".