21444829586 has 8 divisors (see below), whose sum is σ = 32207607180. Its totient is φ = 10708960528.

The previous prime is 21444829573. The next prime is 21444829613. The reversal of 21444829586 is 68592844412.

It can be written as a sum of positive squares in 2 ways, for example, as 21001516561 + 443313025 = 144919^2 + 21055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 6725141 + ... + 6728328.

Almost surely, 2^21444829586 is an apocalyptic number.

21444829586 is a deficient number, since it is larger than the sum of its proper divisors (10762777594).

21444829586 is a wasteful number, since it uses less digits than its factorization.

21444829586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13454268.

The product of its digits is 4423680, while the sum is 53.

The spelling of 21444829586 in words is "twenty-one billion, four hundred forty-four million, eight hundred twenty-nine thousand, five hundred eighty-six".