22505687 has 2 divisors, whose sum is σ = 22505688. Its totient is φ = 22505686.

The previous prime is 22505663. The next prime is 22505689. The reversal of 22505687 is 78650522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22505687 - 2¹⁰ = 22504663 is a prime.

Together with 22505689, 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 (22505689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11252843 + 11252844.

It is an arithmetic number, because the mean of its divisors is an integer number (11252844).

Almost surely, 2^22505687 is an apocalyptic number.

22505687 is a deficient number, since it is larger than the sum of its proper divisors (1).

22505687 is an equidigital number, since it uses as much as digits as its factorization.

22505687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 22505687 is about 4744.0159148131. The cubic root of 22505687 is about 282.3345918691.

The spelling of 22505687 in words is "twenty-two million, five hundred five thousand, six hundred eighty-seven".