23721964 has 12 divisors (see below), whose sum is σ = 47443984. Its totient is φ = 10166544.

The previous prime is 23721959. The next prime is 23721979. The reversal of 23721964 is 46912732.

23721964 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423579 + ... + 423634.

Almost surely, 2^23721964 is an apocalyptic number.

It is an amenable number.

23721964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23721964 is a wasteful number, since it uses less digits than its factorization.

23721964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847224 (or 847222 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 23721964 is about 4870.5198901144. The cubic root of 23721964 is about 287.3317033922.

It can be divided in two parts, 237 and 21964, that added together give a square (22201 = 149²).

The spelling of 23721964 in words is "twenty-three million, seven hundred twenty-one thousand, nine hundred sixty-four".