21827282212 has 6 divisors (see below), whose sum is σ = 38197743878. Its totient is φ = 10913641104.

The previous prime is 21827282207. The next prime is 21827282221. The reversal of 21827282212 is 21228272812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19050624576 + 2776657636 = 138024^2 + 52694^2 .

It is a super-2 number, since 2×21827282212² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2728410273 + ... + 2728410280.

Almost surely, 2^21827282212 is an apocalyptic number.

It is an amenable number.

21827282212 is a deficient number, since it is larger than the sum of its proper divisors (16370461666).

21827282212 is a wasteful number, since it uses less digits than its factorization.

21827282212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456820557 (or 5456820555 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The spelling of 21827282212 in words is "twenty-one billion, eight hundred twenty-seven million, two hundred eighty-two thousand, two hundred twelve".