21060442443 has 4 divisors (see below), whose sum is σ = 28080589928. Its totient is φ = 14040294960.

The previous prime is 21060442421. The next prime is 21060442451. The reversal of 21060442443 is 34424406012.

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

It is not a de Polignac number, because 21060442443 - 2¹⁰ = 21060441419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21060442443.

It is not an unprimeable number, because it can be changed into a prime (21060444443) 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, 3510073738 + ... + 3510073743.

It is an arithmetic number, because the mean of its divisors is an integer number (7020147482).

Almost surely, 2^21060442443 is an apocalyptic number.

21060442443 is a deficient number, since it is larger than the sum of its proper divisors (7020147485).

21060442443 is an equidigital number, since it uses as much as digits as its factorization.

21060442443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020147484.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21060442443 its reverse (34424406012), we get a palindrome (55484848455).

The spelling of 21060442443 in words is "twenty-one billion, sixty million, four hundred forty-two thousand, four hundred forty-three".