23220343728 has 30 divisors (see below), whose sum is σ = 64984712364. Its totient is φ = 7740114528.

The previous prime is 23220343723. The next prime is 23220343733. The reversal of 23220343728 is 82734302232.

23220343728 is a `hidden beast` number, since 23 + 220 + 343 + 72 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (23220343723) and next prime (23220343733).

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

It is a junction number, because it is equal to n+sod(n) for n = 23220343692 and 23220343701.

It is not an unprimeable number, because it can be changed into a prime (23220343723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80626050 + ... + 80626337.

Almost surely, 2^23220343728 is an apocalyptic number.

It is an amenable number.

23220343728 is an abundant number, since it is smaller than the sum of its proper divisors (41764368636).

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

23220343728 is a wasteful number, since it uses less digits than its factorization.

23220343728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161252401 (or 161252392 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The spelling of 23220343728 in words is "twenty-three billion, two hundred twenty million, three hundred forty-three thousand, seven hundred twenty-eight".