23388320818640 has 80 divisors (see below), whose sum is σ = 54691130793600. Its totient is φ = 9301448019456.

The previous prime is 23388320818613. The next prime is 23388320818651. The reversal of 23388320818640 is 4681802388332.

It is a tau number, because it is divible by the number of its divisors (80).

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, 84048374 + ... + 84326186.

It is an arithmetic number, because the mean of its divisors is an integer number (683639134920).

Almost surely, 2^{23388320818640} is an apocalyptic number.

23388320818640 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 23388320818640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27345565396800).

23388320818640 is an abundant number, since it is smaller than the sum of its proper divisors (31302809974960).

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

23388320818640 is a wasteful number, since it uses less digits than its factorization.

23388320818640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283884 (or 283878 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 23388320818640 in words is "twenty-three trillion, three hundred eighty-eight billion, three hundred twenty million, eight hundred eighteen thousand, six hundred forty".