21543024179 has 2 divisors, whose sum is σ = 21543024180. Its totient is φ = 21543024178.

The previous prime is 21543024161. The next prime is 21543024203. The reversal of 21543024179 is 97142034512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21543024179 - 2²⁸ = 21274588723 is a prime.

It is not a weakly prime, because it can be changed into another prime (21543024149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10771512089 + 10771512090.

It is an arithmetic number, because the mean of its divisors is an integer number (10771512090).

Almost surely, 2^21543024179 is an apocalyptic number.

21543024179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21543024179 is an equidigital number, since it uses as much as digits as its factorization.

21543024179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 21543024179 in words is "twenty-one billion, five hundred forty-three million, twenty-four thousand, one hundred seventy-nine".