21524424562 has 4 divisors (see below), whose sum is σ = 32286636846. Its totient is φ = 10762212280.

The previous prime is 21524424541. The next prime is 21524424589. The reversal of 21524424562 is 26542442512.

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

It can be written as a sum of positive squares in only one way, i.e., 12095820361 + 9428604201 = 109981^2 + 97101^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5381106139 + ... + 5381106142.

Almost surely, 2^21524424562 is an apocalyptic number.

21524424562 is a deficient number, since it is larger than the sum of its proper divisors (10762212284).

21524424562 is a wasteful number, since it uses less digits than its factorization.

21524424562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10762212283.

The product of its digits is 153600, while the sum is 37.

The spelling of 21524424562 in words is "twenty-one billion, five hundred twenty-four million, four hundred twenty-four thousand, five hundred sixty-two".