21133030443 has 16 divisors (see below), whose sum is σ = 32336342016. Its totient is φ = 12025906560.

The previous prime is 21133030441. The next prime is 21133030487. The reversal of 21133030443 is 34403033112.

It is not a de Polignac number, because 21133030443 - 2¹ = 21133030441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21133030441) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2082771 + ... + 2092892.

It is an arithmetic number, because the mean of its divisors is an integer number (2021021376).

Almost surely, 2^21133030443 is an apocalyptic number.

21133030443 is a deficient number, since it is larger than the sum of its proper divisors (11203311573).

21133030443 is a wasteful number, since it uses less digits than its factorization.

21133030443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175914.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21133030443 its reverse (34403033112), we get a palindrome (55536063555).

The spelling of 21133030443 in words is "twenty-one billion, one hundred thirty-three million, thirty thousand, four hundred forty-three".