22620287 has 2 divisors, whose sum is σ = 22620288. Its totient is φ = 22620286.

The previous prime is 22620281. The next prime is 22620289. The reversal of 22620287 is 78202622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22620287 - 2⁴ = 22620271 is a prime.

Together with 22620289, 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 (22620281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11310143 + 11310144.

It is an arithmetic number, because the mean of its divisors is an integer number (11310144).

Almost surely, 2^22620287 is an apocalyptic number.

22620287 is a deficient number, since it is larger than the sum of its proper divisors (1).

22620287 is an equidigital number, since it uses as much as digits as its factorization.

22620287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 22620287 is about 4756.0789522463. The cubic root of 22620287 is about 282.8130010288.

The spelling of 22620287 in words is "twenty-two million, six hundred twenty thousand, two hundred eighty-seven".