20420221033 has 8 divisors (see below), whose sum is σ = 20459565728. Its totient is φ = 20380901184.

The previous prime is 20420221027. The next prime is 20420221043. The reversal of 20420221033 is 33012202402.

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

It is a cyclic number.

It is not a de Polignac number, because 20420221033 - 2¹⁷ = 20420089961 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 20420221033.

It is not an unprimeable number, because it can be changed into a prime (20420221043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2682010 + ... + 2689612.

It is an arithmetic number, because the mean of its divisors is an integer number (2557445716).

Almost surely, 2^20420221033 is an apocalyptic number.

It is an amenable number.

20420221033 is a deficient number, since it is larger than the sum of its proper divisors (39344695).

20420221033 is an equidigital number, since it uses as much as digits as its factorization.

20420221033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12423.

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

Adding to 20420221033 its reverse (33012202402), we get a palindrome (53432423435).

The spelling of 20420221033 in words is "twenty billion, four hundred twenty million, two hundred twenty-one thousand, thirty-three".