23121544426720 has 288 divisors, whose sum is σ = 59071473635328. Its totient is φ = 8547185028096.

The previous prime is 23121544426703. The next prime is 23121544426751. The reversal of 23121544426720 is 2762444512132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 833405169 + ... + 833432911.

It is an arithmetic number, because the mean of its divisors is an integer number (205109283456).

Almost surely, 2^{23121544426720} is an apocalyptic number.

23121544426720 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 23121544426720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29535736817664).

23121544426720 is an abundant number, since it is smaller than the sum of its proper divisors (35949929208608).

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

23121544426720 is a wasteful number, since it uses less digits than its factorization.

23121544426720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28150 (or 28123 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

Adding to 23121544426720 its reverse (2762444512132), we get a palindrome (25883988938852).

The spelling of 23121544426720 in words is "twenty-three trillion, one hundred twenty-one billion, five hundred forty-four million, four hundred twenty-six thousand, seven hundred twenty".