22209728687 has 2 divisors, whose sum is σ = 22209728688. Its totient is φ = 22209728686.

The previous prime is 22209728663. The next prime is 22209728731. The reversal of 22209728687 is 78682790222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22209728687 - 2²⁰ = 22208680111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22209728617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11104864343 + 11104864344.

It is an arithmetic number, because the mean of its divisors is an integer number (11104864344).

Almost surely, 2^22209728687 is an apocalyptic number.

22209728687 is a deficient number, since it is larger than the sum of its proper divisors (1).

22209728687 is an equidigital number, since it uses as much as digits as its factorization.

22209728687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 22209728687 in words is "twenty-two billion, two hundred nine million, seven hundred twenty-eight thousand, six hundred eighty-seven".