22018727 has 2 divisors, whose sum is σ = 22018728. Its totient is φ = 22018726.

The previous prime is 22018699. The next prime is 22018729. The reversal of 22018727 is 72781022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22018727 - 2⁸ = 22018471 is a prime.

Together with 22018729, it forms a pair of twin primes.

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 22018727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22018729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11009363 + 11009364.

It is an arithmetic number, because the mean of its divisors is an integer number (11009364).

Almost surely, 2^22018727 is an apocalyptic number.

22018727 is a deficient number, since it is larger than the sum of its proper divisors (1).

22018727 is an equidigital number, since it uses as much as digits as its factorization.

22018727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 22018727 is about 4692.4116400844. The cubic root of 22018727 is about 280.2834162603.

Adding to 22018727 its reverse (72781022), we get a palindrome (94799749).

The spelling of 22018727 in words is "twenty-two million, eighteen thousand, seven hundred twenty-seven".