23109966 has 48 divisors (see below), whose sum is σ = 57507840. Its totient is φ = 6633360.

The previous prime is 23109943. The next prime is 23109971. The reversal of 23109966 is 66990132.

It is a self number, because there is not a number n which added to its sum of digits gives 23109966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 691 + ... + 6833.

It is an arithmetic number, because the mean of its divisors is an integer number (1198080).

Almost surely, 2^23109966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23109966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28753920).

23109966 is an abundant number, since it is smaller than the sum of its proper divisors (34397874).

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

23109966 is a wasteful number, since it uses less digits than its factorization.

23109966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6181 (or 6178 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 23109966 is about 4807.2826003887. The cubic root of 23109966 is about 284.8392075461.

The spelling of 23109966 in words is "twenty-three million, one hundred nine thousand, nine hundred sixty-six".