23181398240 has 1152 divisors, whose sum is σ = 83398533120. Its totient is φ = 5960908800.

The previous prime is 23181398231. The next prime is 23181398243. The reversal of 23181398240 is 4289318132.

It is a super-2 number, since 2×23181398240² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23181398243) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 747787025 + ... + 747787055.

It is an arithmetic number, because the mean of its divisors is an integer number (72394560).

Almost surely, 2^23181398240 is an apocalyptic number.

23181398240 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 23181398240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41699266560).

23181398240 is an abundant number, since it is smaller than the sum of its proper divisors (60217134880).

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

23181398240 is a wasteful number, since it uses less digits than its factorization.

23181398240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 23181398240 in words is "twenty-three billion, one hundred eighty-one million, three hundred ninety-eight thousand, two hundred forty".