20420034221 has 8 divisors (see below), whose sum is σ = 20452824000. Its totient is φ = 20387266240.

The previous prime is 20420034203. The next prime is 20420034233. The reversal of 20420034221 is 12243002402.

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 20420034221 - 2¹⁰ = 20420033197 is a prime.

It is a super-2 number, since 2×20420034221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20420034193 and 20420034202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420034251) 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 7 ways as a sum of consecutive naturals, for example, 3394106 + ... + 3400116.

It is an arithmetic number, because the mean of its divisors is an integer number (2556603000).

Almost surely, 2^20420034221 is an apocalyptic number.

It is an amenable number.

20420034221 is a deficient number, since it is larger than the sum of its proper divisors (32789779).

20420034221 is an equidigital number, since it uses as much as digits as its factorization.

20420034221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10899.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20420034221 its reverse (12243002402), we get a palindrome (32663036623).

The spelling of 20420034221 in words is "twenty billion, four hundred twenty million, thirty-four thousand, two hundred twenty-one".