23301304032440 has 128 divisors (see below), whose sum is σ = 63156556224000. Its totient is φ = 7558300988928.

The previous prime is 23301304032437. The next prime is 23301304032449. The reversal of 23301304032440 is 4423040310332.

It is a super-2 number, since 2×23301304032440² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23301304032449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 968054 + ... + 6894906.

It is an arithmetic number, because the mean of its divisors is an integer number (493410595500).

Almost surely, 2^{23301304032440} is an apocalyptic number.

23301304032440 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 23301304032440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31578278112000).

23301304032440 is an abundant number, since it is smaller than the sum of its proper divisors (39855252191560).

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

23301304032440 is a wasteful number, since it uses less digits than its factorization.

23301304032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5927629 (or 5927625 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 23301304032440 its reverse (4423040310332), we get a palindrome (27724344342772).

The spelling of 23301304032440 in words is "twenty-three trillion, three hundred one billion, three hundred four million, thirty-two thousand, four hundred forty".