23721994 has 16 divisors (see below), whose sum is σ = 37656000. Its totient is φ = 11176704.

The previous prime is 23721991. The next prime is 23722001. The reversal of 23721994 is 49912732.

It is not an unprimeable number, because it can be changed into a prime (23721991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5994 + ... + 9130.

It is an arithmetic number, because the mean of its divisors is an integer number (2353500).

Almost surely, 2^23721994 is an apocalyptic number.

23721994 is a deficient number, since it is larger than the sum of its proper divisors (13934006).

23721994 is a wasteful number, since it uses less digits than its factorization.

23721994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357.

The product of its digits is 27216, while the sum is 37.

The square root of 23721994 is about 4870.5229698668. The cubic root of 23721994 is about 287.3318245169.

The spelling of 23721994 in words is "twenty-three million, seven hundred twenty-one thousand, nine hundred ninety-four".