21396227283 has 12 divisors (see below), whose sum is σ = 31624398520. Its totient is φ = 13932426816.

The previous prime is 21396227239. The next prime is 21396227291. The reversal of 21396227283 is 38272269312.

21396227283 is a `hidden beast` number, since 2 + 13 + 9 + 622 + 7 + 2 + 8 + 3 = 666.

It is not a de Polignac number, because 21396227283 - 2¹² = 21396223187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21396227213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27643318 + ... + 27644091.

Almost surely, 2^21396227283 is an apocalyptic number.

21396227283 is a deficient number, since it is larger than the sum of its proper divisors (10228171237).

21396227283 is a wasteful number, since it uses less digits than its factorization.

21396227283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55287458 (or 55287455 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The spelling of 21396227283 in words is "twenty-one billion, three hundred ninety-six million, two hundred twenty-seven thousand, two hundred eighty-three".