22687936987 has 2 divisors, whose sum is σ = 22687936988. Its totient is φ = 22687936986.

The previous prime is 22687936981. The next prime is 22687936991. The reversal of 22687936987 is 78963978622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22687936987 is a prime.

It is not a weakly prime, because it can be changed into another prime (22687936981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11343968493 + 11343968494.

It is an arithmetic number, because the mean of its divisors is an integer number (11343968494).

Almost surely, 2^22687936987 is an apocalyptic number.

22687936987 is a deficient number, since it is larger than the sum of its proper divisors (1).

22687936987 is an equidigital number, since it uses as much as digits as its factorization.

22687936987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109734912, while the sum is 67.

The spelling of 22687936987 in words is "twenty-two billion, six hundred eighty-seven million, nine hundred thirty-six thousand, nine hundred eighty-seven".