23121733240 has 32 divisors (see below), whose sum is σ = 52031160000. Its totient is φ = 9247402624.

The previous prime is 23121733231. The next prime is 23121733247. The reversal of 23121733240 is 4233712132.

It is a super-2 number, since 2×23121733240² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23121733199 and 23121733208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121733247) 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, 281601 + ... + 354319.

It is an arithmetic number, because the mean of its divisors is an integer number (1625973750).

Almost surely, 2^23121733240 is an apocalyptic number.

23121733240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121733240 is an abundant number, since it is smaller than the sum of its proper divisors (28909426760).

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

23121733240 is a wasteful number, since it uses less digits than its factorization.

23121733240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80679 (or 80675 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The spelling of 23121733240 in words is "twenty-three billion, one hundred twenty-one million, seven hundred thirty-three thousand, two hundred forty".