21175719703 has 2 divisors, whose sum is σ = 21175719704. Its totient is φ = 21175719702.

The previous prime is 21175719679. The next prime is 21175719709. The reversal of 21175719703 is 30791757112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21175719703 - 2¹³ = 21175711511 is a prime.

It is a super-2 number, since 2×21175719703² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21175719703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21175719709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10587859851 + 10587859852.

It is an arithmetic number, because the mean of its divisors is an integer number (10587859852).

Almost surely, 2^21175719703 is an apocalyptic number.

21175719703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21175719703 is an equidigital number, since it uses as much as digits as its factorization.

21175719703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92610, while the sum is 43.

The spelling of 21175719703 in words is "twenty-one billion, one hundred seventy-five million, seven hundred nineteen thousand, seven hundred three".