23011312240 has 40 divisors (see below), whose sum is σ = 61144345440. Its totient is φ = 7889592576.

The previous prime is 23011312211. The next prime is 23011312249. The reversal of 23011312240 is 4221311032.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011312249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20545255 + ... + 20546374.

It is an arithmetic number, because the mean of its divisors is an integer number (1528608636).

Almost surely, 2^23011312240 is an apocalyptic number.

23011312240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23011312240 is an abundant number, since it is smaller than the sum of its proper divisors (38133033200).

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

23011312240 is a wasteful number, since it uses less digits than its factorization.

23011312240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41091649 (or 41091643 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23011312240 its reverse (4221311032), we get a palindrome (27232623272).

The spelling of 23011312240 in words is "twenty-three billion, eleven million, three hundred twelve thousand, two hundred forty".