21422020033 has 4 divisors (see below), whose sum is σ = 21424222660. Its totient is φ = 21419817408.

The previous prime is 21422019967. The next prime is 21422020049. The reversal of 21422020033 is 33002022412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4023618624 + 17398401409 = 63432^2 + 131903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21422020033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21422050033) 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, 1086660 + ... + 1106197.

It is an arithmetic number, because the mean of its divisors is an integer number (5356055665).

Almost surely, 2^21422020033 is an apocalyptic number.

It is an amenable number.

21422020033 is a deficient number, since it is larger than the sum of its proper divisors (2202627).

21422020033 is an equidigital number, since it uses as much as digits as its factorization.

21422020033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202626.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21422020033 its reverse (33002022412), we get a palindrome (54424042445).

The spelling of 21422020033 in words is "twenty-one billion, four hundred twenty-two million, twenty thousand, thirty-three".