21627064443 has 4 divisors (see below), whose sum is σ = 28836085928. Its totient is φ = 14418042960.

The previous prime is 21627064391. The next prime is 21627064483. The reversal of 21627064443 is 34446072612.

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

It is not a de Polignac number, because 21627064443 - 2¹² = 21627060347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21627064483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3604510738 + ... + 3604510743.

It is an arithmetic number, because the mean of its divisors is an integer number (7209021482).

Almost surely, 2^21627064443 is an apocalyptic number.

21627064443 is a deficient number, since it is larger than the sum of its proper divisors (7209021485).

21627064443 is an equidigital number, since it uses as much as digits as its factorization.

21627064443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209021484.

The product of its (nonzero) digits is 193536, while the sum is 39.

The spelling of 21627064443 in words is "twenty-one billion, six hundred twenty-seven million, sixty-four thousand, four hundred forty-three".