21275471683 has 2 divisors, whose sum is σ = 21275471684. Its totient is φ = 21275471682.

The previous prime is 21275471681. The next prime is 21275471699. The reversal of 21275471683 is 38617457212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21275471683 - 2¹ = 21275471681 is a prime.

Together with 21275471681, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21275471681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637735841 + 10637735842.

It is an arithmetic number, because the mean of its divisors is an integer number (10637735842).

Almost surely, 2^21275471683 is an apocalyptic number.

21275471683 is a deficient number, since it is larger than the sum of its proper divisors (1).

21275471683 is an equidigital number, since it uses as much as digits as its factorization.

21275471683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The spelling of 21275471683 in words is "twenty-one billion, two hundred seventy-five million, four hundred seventy-one thousand, six hundred eighty-three".