23321857728 has 224 divisors, whose sum is σ = 70603384320. Its totient is φ = 6730629120.

The previous prime is 23321857651. The next prime is 23321857747. The reversal of 23321857728 is 82775812332.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15232323 + ... + 15233853.

It is an arithmetic number, because the mean of its divisors is an integer number (315193680).

Almost surely, 2^23321857728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23321857728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35301692160).

23321857728 is an abundant number, since it is smaller than the sum of its proper divisors (47281526592).

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

23321857728 is a wasteful number, since it uses less digits than its factorization.

23321857728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935 (or 1925 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The spelling of 23321857728 in words is "twenty-three billion, three hundred twenty-one million, eight hundred fifty-seven thousand, seven hundred twenty-eight".