20022239 has 2 divisors, whose sum is σ = 20022240. Its totient is φ = 20022238.

The previous prime is 20022229. The next prime is 20022269. The reversal of 20022239 is 93222002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20022239 - 2²⁴ = 3245023 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20022239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011119 + 10011120.

It is an arithmetic number, because the mean of its divisors is an integer number (10011120).

Almost surely, 2^20022239 is an apocalyptic number.

20022239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022239 is an equidigital number, since it uses as much as digits as its factorization.

20022239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20022239 is about 4474.6216599842. The cubic root of 20022239 is about 271.5423342804.

The spelling of 20022239 in words is "twenty million, twenty-two thousand, two hundred thirty-nine".