23136866 has 4 divisors (see below), whose sum is σ = 34705302. Its totient is φ = 11568432.

The previous prime is 23136857. The next prime is 23136887. The reversal of 23136866 is 66863132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23088025 + 48841 = 4805^2 + 221^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5784215 + ... + 5784218.

Almost surely, 2^23136866 is an apocalyptic number.

23136866 is a deficient number, since it is larger than the sum of its proper divisors (11568436).

23136866 is a wasteful number, since it uses less digits than its factorization.

23136866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11568435.

The product of its digits is 31104, while the sum is 35.

The square root of 23136866 is about 4810.0796251206. The cubic root of 23136866 is about 284.9496823038.

Adding to 23136866 its reverse (66863132), we get a palindrome (89999998).

The spelling of 23136866 in words is "twenty-three million, one hundred thirty-six thousand, eight hundred sixty-six".