22000427 has 2 divisors, whose sum is σ = 22000428. Its totient is φ = 22000426.

The previous prime is 22000409. The next prime is 22000441. The reversal of 22000427 is 72400022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22000427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22000487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000213 + 11000214.

It is an arithmetic number, because the mean of its divisors is an integer number (11000214).

Almost surely, 2^22000427 is an apocalyptic number.

22000427 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000427 is an equidigital number, since it uses as much as digits as its factorization.

22000427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 22000427 is about 4690.4612779555. The cubic root of 22000427 is about 280.2057458883.

Adding to 22000427 its reverse (72400022), we get a palindrome (94400449).

The spelling of 22000427 in words is "twenty-two million, four hundred twenty-seven", and thus it is an aban number.