21417426467543 has 2 divisors, whose sum is σ = 21417426467544. Its totient is φ = 21417426467542.

The previous prime is 21417426467471. The next prime is 21417426467573. The reversal of 21417426467543 is 34576462471412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21417426467543 - 2¹⁴ = 21417426451159 is a prime.

It is a super-2 number, since 2×21417426467543² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21417426467573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10708713233771 + 10708713233772.

It is an arithmetic number, because the mean of its divisors is an integer number (10708713233772).

Almost surely, 2^{21417426467543} is an apocalyptic number.

21417426467543 is a deficient number, since it is larger than the sum of its proper divisors (1).

21417426467543 is an equidigital number, since it uses as much as digits as its factorization.

21417426467543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27095040, while the sum is 56.

The spelling of 21417426467543 in words is "twenty-one trillion, four hundred seventeen billion, four hundred twenty-six million, four hundred sixty-seven thousand, five hundred forty-three".