23719681 has 4 divisors (see below), whose sum is σ = 24484864. Its totient is φ = 22954500.

The previous prime is 23719643. The next prime is 23719691. The reversal of 23719681 is 18691732.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23719681 - 2⁹ = 23719169 is a prime.

It is a super-2 number, since 2×23719681² = 1125246533483522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23719681.

It is not an unprimeable number, because it can be changed into a prime (23719691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382545 + ... + 382606.

It is an arithmetic number, because the mean of its divisors is an integer number (6121216).

Almost surely, 2^23719681 is an apocalyptic number.

It is an amenable number.

23719681 is a deficient number, since it is larger than the sum of its proper divisors (765183).

23719681 is an equidigital number, since it uses as much as digits as its factorization.

23719681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765182.

The product of its digits is 18144, while the sum is 37.

The square root of 23719681 is about 4870.2855152445. The cubic root of 23719681 is about 287.3224855028.

The spelling of 23719681 in words is "twenty-three million, seven hundred nineteen thousand, six hundred eighty-one".