23909318 has 4 divisors (see below), whose sum is σ = 35863980. Its totient is φ = 11954658.

The previous prime is 23909317. The next prime is 23909371. The reversal of 23909318 is 81390932.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23909317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5977328 + ... + 5977331.

It is an arithmetic number, because the mean of its divisors is an integer number (8965995).

Almost surely, 2^23909318 is an apocalyptic number.

23909318 is a deficient number, since it is larger than the sum of its proper divisors (11954662).

23909318 is a wasteful number, since it uses less digits than its factorization.

23909318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11954661.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 23909318 is about 4889.7155336481. The cubic root of 23909318 is about 288.0861608848.

The spelling of 23909318 in words is "twenty-three million, nine hundred nine thousand, three hundred eighteen".