22691866 has 4 divisors (see below), whose sum is σ = 34037802. Its totient is φ = 11345932.

The previous prime is 22691863. The next prime is 22691873. The reversal of 22691866 is 66819622.

It is a happy number.

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., 15046641 + 7645225 = 3879^2 + 2765^2 .

It is not an unprimeable number, because it can be changed into a prime (22691863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5672965 + ... + 5672968.

Almost surely, 2^22691866 is an apocalyptic number.

22691866 is a deficient number, since it is larger than the sum of its proper divisors (11345936).

22691866 is a wasteful number, since it uses less digits than its factorization.

22691866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11345935.

The product of its digits is 62208, while the sum is 40.

The square root of 22691866 is about 4763.5980099081. The cubic root of 22691866 is about 283.1109954299.

The spelling of 22691866 in words is "twenty-two million, six hundred ninety-one thousand, eight hundred sixty-six".