23099985 has 20 divisors (see below), whose sum is σ = 41409588. Its totient is φ = 12319776.

The previous prime is 23099969. The next prime is 23100001. The reversal of 23099985 is 58999032.

It is an interprime number because it is at equal distance from previous prime (23099969) and next prime (23100001).

It can be written as a sum of positive squares in 2 ways, for example, as 4359744 + 18740241 = 2088^2 + 4329^2 .

It is not a de Polignac number, because 23099985 - 2⁴ = 23099969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 23099985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28114 + ... + 28923.

Almost surely, 2^23099985 is an apocalyptic number.

It is an amenable number.

23099985 is a deficient number, since it is larger than the sum of its proper divisors (18309603).

23099985 is an equidigital number, since it uses as much as digits as its factorization.

23099985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57054 (or 57045 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 23099985 is about 4806.2443758095. The cubic root of 23099985 is about 284.7981950883.

The spelling of 23099985 in words is "twenty-three million, ninety-nine thousand, nine hundred eighty-five".