23206663 has 4 divisors (see below), whose sum is σ = 23216368. Its totient is φ = 23196960.

The previous prime is 23206643. The next prime is 23206727. The reversal of 23206663 is 36660232.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23206663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23206643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1558 + ... + 6988.

It is an arithmetic number, because the mean of its divisors is an integer number (5804092).

Almost surely, 2^23206663 is an apocalyptic number.

23206663 is a deficient number, since it is larger than the sum of its proper divisors (9705).

23206663 is an equidigital number, since it uses as much as digits as its factorization.

23206663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9704.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 23206663 is about 4817.3294469031. The cubic root of 23206663 is about 285.2359306239.

Adding to 23206663 its reverse (36660232), we get a palindrome (59866895).

The spelling of 23206663 in words is "twenty-three million, two hundred six thousand, six hundred sixty-three".