20422079 has 2 divisors, whose sum is σ = 20422080. Its totient is φ = 20422078.

The previous prime is 20422043. The next prime is 20422081. The reversal of 20422079 is 97022402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20422079 is a prime.

It is a super-2 number, since 2×20422079² = 834122621364482, which contains 22 as substring.

Together with 20422081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20422579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211039 + 10211040.

It is an arithmetic number, because the mean of its divisors is an integer number (10211040).

Almost surely, 2^20422079 is an apocalyptic number.

20422079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422079 is an equidigital number, since it uses as much as digits as its factorization.

20422079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20422079 is about 4519.0794416562. The cubic root of 20422079 is about 273.3379821075.

The spelling of 20422079 in words is "twenty million, four hundred twenty-two thousand, seventy-nine".