22000209977 has 2 divisors, whose sum is σ = 22000209978. Its totient is φ = 22000209976.

The previous prime is 22000209971. The next prime is 22000209997. The reversal of 22000209977 is 77990200022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12909731641 + 9090478336 = 113621^2 + 95344^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000209977 - 2¹⁰ = 22000208953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22000209977.

It is not a weakly prime, because it can be changed into another prime (22000209971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000104988 + 11000104989.

It is an arithmetic number, because the mean of its divisors is an integer number (11000104989).

Almost surely, 2^22000209977 is an apocalyptic number.

It is an amenable number.

22000209977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000209977 is an equidigital number, since it uses as much as digits as its factorization.

22000209977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

Adding to 22000209977 its reverse (77990200022), we get a palindrome (99990409999).

The spelling of 22000209977 in words is "twenty-two billion, two hundred nine thousand, nine hundred seventy-seven".