21360021703 has 2 divisors, whose sum is σ = 21360021704. Its totient is φ = 21360021702.

The previous prime is 21360021587. The next prime is 21360021737. The reversal of 21360021703 is 30712006312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21360021703 - 2⁹ = 21360021191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21360021743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10680010851 + 10680010852.

It is an arithmetic number, because the mean of its divisors is an integer number (10680010852).

Almost surely, 2^21360021703 is an apocalyptic number.

21360021703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21360021703 is an equidigital number, since it uses as much as digits as its factorization.

21360021703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The spelling of 21360021703 in words is "twenty-one billion, three hundred sixty million, twenty-one thousand, seven hundred three".