22420427 has 2 divisors, whose sum is σ = 22420428. Its totient is φ = 22420426.

The previous prime is 22420421. The next prime is 22420429. The reversal of 22420427 is 72402422.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22420427 - 2²⁰ = 21371851 is a prime.

Together with 22420429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22420421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11210213 + 11210214.

It is an arithmetic number, because the mean of its divisors is an integer number (11210214).

Almost surely, 2^22420427 is an apocalyptic number.

22420427 is a deficient number, since it is larger than the sum of its proper divisors (1).

22420427 is an equidigital number, since it uses as much as digits as its factorization.

22420427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 22420427 is about 4735.0213304694. The cubic root of 22420427 is about 281.9776108510.

Adding to 22420427 its reverse (72402422), we get a palindrome (94822849).

The spelling of 22420427 in words is "twenty-two million, four hundred twenty thousand, four hundred twenty-seven".