21603343413871 has 2 divisors, whose sum is σ = 21603343413872. Its totient is φ = 21603343413870.

The previous prime is 21603343413857. The next prime is 21603343413887. The reversal of 21603343413871 is 17831434330612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21603343413871 - 2¹⁷ = 21603343282799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21603343413851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801671706935 + 10801671706936.

It is an arithmetic number, because the mean of its divisors is an integer number (10801671706936).

Almost surely, 2^{21603343413871} is an apocalyptic number.

21603343413871 is a deficient number, since it is larger than the sum of its proper divisors (1).

21603343413871 is an equidigital number, since it uses as much as digits as its factorization.

21603343413871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 21603343413871 in words is "twenty-one trillion, six hundred three billion, three hundred forty-three million, four hundred thirteen thousand, eight hundred seventy-one".