23112990720 has 720 divisors, whose sum is σ = 88329346560. Its totient is φ = 5571084288.

The previous prime is 23112990709. The next prime is 23112990779. The reversal of 23112990720 is 2709921132.

It is a tau number, because it is divible by the number of its divisors (720).

It is a super-2 number, since 2×23112990720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 491765737 + ... + 491765783.

It is an arithmetic number, because the mean of its divisors is an integer number (122679648).

Almost surely, 2^23112990720 is an apocalyptic number.

23112990720 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 23112990720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44164673280).

23112990720 is an abundant number, since it is smaller than the sum of its proper divisors (65216355840).

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

23112990720 is a wasteful number, since it uses less digits than its factorization.

23112990720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 23112990720 in words is "twenty-three billion, one hundred twelve million, nine hundred ninety thousand, seven hundred twenty".