22636220399987 has 4 divisors (see below), whose sum is σ = 22643615444016. Its totient is φ = 22628825355960.

The previous prime is 22636220399963. The next prime is 22636220399993. The reversal of 22636220399987 is 78999302263622.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22636220399987 - 2¹⁶ = 22636220334451 is a prime.

It is a super-3 number, since 3×22636220399987³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22636220399887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3697517423 + ... + 3697523544.

It is an arithmetic number, because the mean of its divisors is an integer number (5660903861004).

Almost surely, 2^{22636220399987} is an apocalyptic number.

22636220399987 is a deficient number, since it is larger than the sum of its proper divisors (7395044029).

22636220399987 is an equidigital number, since it uses as much as digits as its factorization.

22636220399987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7395044028.

The product of its (nonzero) digits is 211631616, while the sum is 68.

The spelling of 22636220399987 in words is "twenty-two trillion, six hundred thirty-six billion, two hundred twenty million, three hundred ninety-nine thousand, nine hundred eighty-seven".