21704027113 has 2 divisors, whose sum is σ = 21704027114. Its totient is φ = 21704027112.

The previous prime is 21704027071. The next prime is 21704027167. The reversal of 21704027113 is 31172040712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11666592144 + 10037434969 = 108012^2 + 100187^2 .

It is a cyclic number.

It is not a de Polignac number, because 21704027113 - 2⁹ = 21704026601 is a prime.

It is a super-2 number, since 2×21704027113² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21704027413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10852013556 + 10852013557.

It is an arithmetic number, because the mean of its divisors is an integer number (10852013557).

Almost surely, 2^21704027113 is an apocalyptic number.

It is an amenable number.

21704027113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21704027113 is an equidigital number, since it uses as much as digits as its factorization.

21704027113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

Adding to 21704027113 its reverse (31172040712), we get a palindrome (52876067825).

The spelling of 21704027113 in words is "twenty-one billion, seven hundred four million, twenty-seven thousand, one hundred thirteen".