21603213627713 has 2 divisors, whose sum is σ = 21603213627714. Its totient is φ = 21603213627712.

The previous prime is 21603213627691. The next prime is 21603213627803. The reversal of 21603213627713 is 31772631230612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21161775637249 + 441437990464 = 4600193^2 + 664408^2 .

It is a cyclic number.

It is not a de Polignac number, because 21603213627713 - 2³⁰ = 21602139885889 is a prime.

It is a super-2 number, since 2×21603213627713² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21603213627913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801606813856 + 10801606813857.

It is an arithmetic number, because the mean of its divisors is an integer number (10801606813857).

Almost surely, 2^{21603213627713} is an apocalyptic number.

It is an amenable number.

21603213627713 is a deficient number, since it is larger than the sum of its proper divisors (1).

21603213627713 is an equidigital number, since it uses as much as digits as its factorization.

21603213627713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 21603213627713 in words is "twenty-one trillion, six hundred three billion, two hundred thirteen million, six hundred twenty-seven thousand, seven hundred thirteen".