23981894 has 4 divisors (see below), whose sum is σ = 35972844. Its totient is φ = 11990946.

The previous prime is 23981863. The next prime is 23981897. The reversal of 23981894 is 49818932.

It is a happy number.

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 (23981897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5995472 + ... + 5995475.

It is an arithmetic number, because the mean of its divisors is an integer number (8993211).

Almost surely, 2^23981894 is an apocalyptic number.

23981894 is a deficient number, since it is larger than the sum of its proper divisors (11990950).

23981894 is a wasteful number, since it uses less digits than its factorization.

23981894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11990949.

The product of its digits is 124416, while the sum is 44.

The square root of 23981894 is about 4897.1312010196. The cubic root of 23981894 is about 288.3773586719.

The spelling of 23981894 in words is "twenty-three million, nine hundred eighty-one thousand, eight hundred ninety-four".