21486091474543 has 2 divisors, whose sum is σ = 21486091474544. Its totient is φ = 21486091474542.

The previous prime is 21486091474537. The next prime is 21486091474553. The reversal of 21486091474543 is 34547419068412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21486091474543 - 2³⁷ = 21348652521071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21486091474553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10743045737271 + 10743045737272.

It is an arithmetic number, because the mean of its divisors is an integer number (10743045737272).

It is a 1-persistent number, because it is pandigital, but 2⋅21486091474543 = 42972182949086 is not.

Almost surely, 2^{21486091474543} is an apocalyptic number.

21486091474543 is a deficient number, since it is larger than the sum of its proper divisors (1).

21486091474543 is an equidigital number, since it uses as much as digits as its factorization.

21486091474543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 21486091474543 in words is "twenty-one trillion, four hundred eighty-six billion, ninety-one million, four hundred seventy-four thousand, five hundred forty-three".