22641947 has 4 divisors (see below), whose sum is σ = 22662120. Its totient is φ = 22621776.

The previous prime is 22641937. The next prime is 22641961. The reversal of 22641947 is 74914622.

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

It is a cyclic number.

It is not a de Polignac number, because 22641947 - 2⁸ = 22641691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22641907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8297 + ... + 10682.

It is an arithmetic number, because the mean of its divisors is an integer number (5665530).

Almost surely, 2^22641947 is an apocalyptic number.

22641947 is a deficient number, since it is larger than the sum of its proper divisors (20173).

22641947 is a wasteful number, since it uses less digits than its factorization.

22641947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20172.

The product of its digits is 24192, while the sum is 35.

The square root of 22641947 is about 4758.3554932350. The cubic root of 22641947 is about 282.9032411956.

The spelling of 22641947 in words is "twenty-two million, six hundred forty-one thousand, nine hundred forty-seven".