21714406673 has 2 divisors, whose sum is σ = 21714406674. Its totient is φ = 21714406672.

The previous prime is 21714406657. The next prime is 21714406687. The reversal of 21714406673 is 37660441712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14636886289 + 7077520384 = 120983^2 + 84128^2 .

It is a cyclic number.

It is not a de Polignac number, because 21714406673 - 2⁴ = 21714406657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21714406673.

It is not a weakly prime, because it can be changed into another prime (21714402673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10857203336 + 10857203337.

It is an arithmetic number, because the mean of its divisors is an integer number (10857203337).

Almost surely, 2^21714406673 is an apocalyptic number.

It is an amenable number.

21714406673 is a deficient number, since it is larger than the sum of its proper divisors (1).

21714406673 is an equidigital number, since it uses as much as digits as its factorization.

21714406673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 21714406673 in words is "twenty-one billion, seven hundred fourteen million, four hundred six thousand, six hundred seventy-three".