22006891 has 8 divisors (see below), whose sum is σ = 23458464. Its totient is φ = 20572800.

The previous prime is 22006879. The next prime is 22006913. The reversal of 22006891 is 19860022.

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 22006891 - 2¹⁹ = 21482603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22006801) 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, 1720 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (2932308).

Almost surely, 2^22006891 is an apocalyptic number.

22006891 is a deficient number, since it is larger than the sum of its proper divisors (1451573).

22006891 is a wasteful number, since it uses less digits than its factorization.

22006891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8741.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 22006891 is about 4691.1502853778. The cubic root of 22006891 is about 280.2331858494.

The spelling of 22006891 in words is "twenty-two million, six thousand, eight hundred ninety-one".