23207681 has 8 divisors (see below), whose sum is σ = 27170304. Its totient is φ = 19406880.

The previous prime is 23207677. The next prime is 23207689. The reversal of 23207681 is 18670232.

It is a happy number.

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 23207681 - 2² = 23207677 is a prime.

It is a super-2 number, since 2×23207681² = 1077192914795522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23207689) 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, 40145 + ... + 40718.

It is an arithmetic number, because the mean of its divisors is an integer number (3396288).

Almost surely, 2^23207681 is an apocalyptic number.

It is an amenable number.

23207681 is a deficient number, since it is larger than the sum of its proper divisors (3962623).

23207681 is an equidigital number, since it uses as much as digits as its factorization.

23207681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80911.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 23207681 is about 4817.4351059459. The cubic root of 23207681 is about 285.2401013504.

It can be divided in two parts, 2320 and 7681, that added together give a palindrome (10001).

The spelling of 23207681 in words is "twenty-three million, two hundred seven thousand, six hundred eighty-one".