22020091 has 2 divisors, whose sum is σ = 22020092. Its totient is φ = 22020090.

The previous prime is 22020079. The next prime is 22020127. The reversal of 22020091 is 19002022.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22020091 - 2⁵ = 22020059 is a prime.

It is not a weakly prime, because it can be changed into another prime (22020191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010045 + 11010046.

It is an arithmetic number, because the mean of its divisors is an integer number (11010046).

Almost surely, 2^22020091 is an apocalyptic number.

22020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020091 is an equidigital number, since it uses as much as digits as its factorization.

22020091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 22020091 is about 4692.5569788762. The cubic root of 22020091 is about 280.2892037382.

The spelling of 22020091 in words is "twenty-two million, twenty thousand, ninety-one".