23313404440 has 64 divisors (see below), whose sum is σ = 54788348160. Its totient is φ = 8911351680.

The previous prime is 23313404437. The next prime is 23313404467. The reversal of 23313404440 is 4440431332.

It is a junction number, because it is equal to n+sod(n) for n = 23313404399 and 23313404408.

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, 992107 + ... + 1015333.

It is an arithmetic number, because the mean of its divisors is an integer number (856067940).

Almost surely, 2^23313404440 is an apocalyptic number.

23313404440 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 23313404440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27394174080).

23313404440 is an abundant number, since it is smaller than the sum of its proper divisors (31474943720).

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

23313404440 is a wasteful number, since it uses less digits than its factorization.

23313404440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24352 (or 24348 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 23313404440 its reverse (4440431332), we get a palindrome (27753835772).

The spelling of 23313404440 in words is "twenty-three billion, three hundred thirteen million, four hundred four thousand, four hundred forty".