21425576543 has 4 divisors (see below), whose sum is σ = 24486373200. Its totient is φ = 18364779888.

The previous prime is 21425576483. The next prime is 21425576581. The reversal of 21425576543 is 34567552412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21425576543 - 2⁸ = 21425576287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21425576494 and 21425576503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21425576143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530398318 + ... + 1530398331.

It is an arithmetic number, because the mean of its divisors is an integer number (6121593300).

Almost surely, 2^21425576543 is an apocalyptic number.

21425576543 is a deficient number, since it is larger than the sum of its proper divisors (3060796657).

21425576543 is an equidigital number, since it uses as much as digits as its factorization.

21425576543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060796656.

The product of its digits is 1008000, while the sum is 44.

The spelling of 21425576543 in words is "twenty-one billion, four hundred twenty-five million, five hundred seventy-six thousand, five hundred forty-three".