22720843 has 2 divisors, whose sum is σ = 22720844. Its totient is φ = 22720842.

The previous prime is 22720837. The next prime is 22720889. The reversal of 22720843 is 34802722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22720843 - 2⁵ = 22720811 is a prime.

It is not a weakly prime, because it can be changed into another prime (22724843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11360421 + 11360422.

It is an arithmetic number, because the mean of its divisors is an integer number (11360422).

Almost surely, 2^22720843 is an apocalyptic number.

22720843 is a deficient number, since it is larger than the sum of its proper divisors (1).

22720843 is an equidigital number, since it uses as much as digits as its factorization.

22720843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 22720843 is about 4766.6385430406. The cubic root of 22720843 is about 283.2314529514.

The spelling of 22720843 in words is "twenty-two million, seven hundred twenty thousand, eight hundred forty-three".