23305681 has 8 divisors (see below), whose sum is σ = 26676864. Its totient is φ = 19944960.

The previous prime is 23305673. The next prime is 23305703. The reversal of 23305681 is 18650332.

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

It is not a de Polignac number, because 23305681 - 2³ = 23305673 is a prime.

It is a super-2 number, since 2×23305681² = 1086309533747522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23305631) 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, 2961 + ... + 7441.

It is an arithmetic number, because the mean of its divisors is an integer number (3334608).

Almost surely, 2^23305681 is an apocalyptic number.

It is an amenable number.

23305681 is a deficient number, since it is larger than the sum of its proper divisors (3371183).

23305681 is an equidigital number, since it uses as much as digits as its factorization.

23305681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 23305681 is about 4827.5957784388. The cubic root of 23305681 is about 285.6410357817.

The spelling of 23305681 in words is "twenty-three million, three hundred five thousand, six hundred eighty-one".