21703385471 has 2 divisors, whose sum is σ = 21703385472. Its totient is φ = 21703385470.

The previous prime is 21703385449. The next prime is 21703385489. The reversal of 21703385471 is 17458330712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21703385471 - 2¹⁰ = 21703384447 is a prime.

It is a super-3 number, since 3×21703385471³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21703385411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10851692735 + 10851692736.

It is an arithmetic number, because the mean of its divisors is an integer number (10851692736).

Almost surely, 2^21703385471 is an apocalyptic number.

21703385471 is a deficient number, since it is larger than the sum of its proper divisors (1).

21703385471 is an equidigital number, since it uses as much as digits as its factorization.

21703385471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 21703385471 in words is "twenty-one billion, seven hundred three million, three hundred eighty-five thousand, four hundred seventy-one".