23989918 has 8 divisors (see below), whose sum is σ = 36101520. Its totient is φ = 11956080.

The previous prime is 23989883. The next prime is 23989957. The reversal of 23989918 is 81998932.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18663 + ... + 19906.

It is an arithmetic number, because the mean of its divisors is an integer number (4512690).

Almost surely, 2^23989918 is an apocalyptic number.

23989918 is a deficient number, since it is larger than the sum of its proper divisors (12111602).

23989918 is a wasteful number, since it uses less digits than its factorization.

23989918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38882.

The product of its digits is 279936, while the sum is 49.

The square root of 23989918 is about 4897.9503876622. The cubic root of 23989918 is about 288.4095174038.

The spelling of 23989918 in words is "twenty-three million, nine hundred eighty-nine thousand, nine hundred eighteen".