23721881 has 8 divisors (see below), whose sum is σ = 24177600. Its totient is φ = 23269680.

The previous prime is 23721869. The next prime is 23721889. The reversal of 23721881 is 18812732.

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

It is a cyclic number.

It is not a de Polignac number, because 23721881 - 2¹⁰ = 23720857 is a prime.

It is a super-2 number, since 2×23721881² = 1125455276356322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23721889) 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, 15530 + ... + 16988.

It is an arithmetic number, because the mean of its divisors is an integer number (3022200).

Almost surely, 2^23721881 is an apocalyptic number.

It is an amenable number.

23721881 is a deficient number, since it is larger than the sum of its proper divisors (455719).

23721881 is a wasteful number, since it uses less digits than its factorization.

23721881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759.

The product of its digits is 5376, while the sum is 32.

The square root of 23721881 is about 4870.5113694560. The cubic root of 23721881 is about 287.3313682800.

The spelling of 23721881 in words is "twenty-three million, seven hundred twenty-one thousand, eight hundred eighty-one".