23011440240 has 160 divisors (see below), whose sum is σ = 73528793856. Its totient is φ = 5949573120.

The previous prime is 23011440211. The next prime is 23011440247. The reversal of 23011440240 is 4204411032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011440247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1596747 + ... + 1611093.

Almost surely, 2^23011440240 is an apocalyptic number.

23011440240 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 23011440240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36764396928).

23011440240 is an abundant number, since it is smaller than the sum of its proper divisors (50517353616).

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

23011440240 is a wasteful number, since it uses less digits than its factorization.

23011440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14567 (or 14561 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 23011440240 its reverse (4204411032), we get a palindrome (27215851272).

The spelling of 23011440240 in words is "twenty-three billion, eleven million, four hundred forty thousand, two hundred forty".