23128221851 has 8 divisors (see below), whose sum is σ = 26439245280. Its totient is φ = 19818946368.

The previous prime is 23128221821. The next prime is 23128221859. The reversal of 23128221851 is 15812282132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23128221851 - 2¹⁴ = 23128205467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23128221859) 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, 408506 + ... + 461663.

It is an arithmetic number, because the mean of its divisors is an integer number (3304905660).

Almost surely, 2^23128221851 is an apocalyptic number.

23128221851 is a deficient number, since it is larger than the sum of its proper divisors (3311023429).

23128221851 is an equidigital number, since it uses as much as digits as its factorization.

23128221851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873973.

The product of its digits is 15360, while the sum is 35.

The spelling of 23128221851 in words is "twenty-three billion, one hundred twenty-eight million, two hundred twenty-one thousand, eight hundred fifty-one".