23218171928 has 128 divisors (see below), whose sum is σ = 53960048640. Its totient is φ = 9147600000.

The previous prime is 23218171891. The next prime is 23218171943. The reversal of 23218171928 is 82917181232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6027203 + ... + 6031053.

It is an arithmetic number, because the mean of its divisors is an integer number (421562880).

Almost surely, 2^23218171928 is an apocalyptic number.

23218171928 is a gapful number since it is divisible by the number (28) 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 23218171928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26980024320).

23218171928 is an abundant number, since it is smaller than the sum of its proper divisors (30741876712).

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

23218171928 is a wasteful number, since it uses less digits than its factorization.

23218171928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069 (or 4065 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The spelling of 23218171928 in words is "twenty-three billion, two hundred eighteen million, one hundred seventy-one thousand, nine hundred twenty-eight".