21882066277 has 2 divisors, whose sum is σ = 21882066278. Its totient is φ = 21882066276.

The previous prime is 21882066259. The next prime is 21882066343. The reversal of 21882066277 is 77266028812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21872635236 + 9431041 = 147894^2 + 3071^2 .

It is a cyclic number.

It is not a de Polignac number, because 21882066277 - 2¹⁹ = 21881541989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21882066277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21882066077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10941033138 + 10941033139.

It is an arithmetic number, because the mean of its divisors is an integer number (10941033139).

Almost surely, 2^21882066277 is an apocalyptic number.

It is an amenable number.

21882066277 is a deficient number, since it is larger than the sum of its proper divisors (1).

21882066277 is an equidigital number, since it uses as much as digits as its factorization.

21882066277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 21882066277 in words is "twenty-one billion, eight hundred eighty-two million, sixty-six thousand, two hundred seventy-seven".