22063891 has 4 divisors (see below), whose sum is σ = 22073752. Its totient is φ = 22054032.

The previous prime is 22063879. The next prime is 22063897. The reversal of 22063891 is 19836022.

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 not a de Polignac number, because 22063891 - 2¹⁵ = 22031123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22063897) 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, 220 + ... + 6646.

It is an arithmetic number, because the mean of its divisors is an integer number (5518438).

Almost surely, 2^22063891 is an apocalyptic number.

22063891 is a deficient number, since it is larger than the sum of its proper divisors (9861).

22063891 is an equidigital number, since it uses as much as digits as its factorization.

22063891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9860.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 22063891 is about 4697.2216255995. The cubic root of 22063891 is about 280.4749210497.

The spelling of 22063891 in words is "twenty-two million, sixty-three thousand, eight hundred ninety-one".