20404221213 has 8 divisors (see below), whose sum is σ = 27233766208. Its totient is φ = 13588745184.

The previous prime is 20404221191. The next prime is 20404221217. The reversal of 20404221213 is 31212240402.

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

It is not a de Polignac number, because 20404221213 - 2¹⁶ = 20404155677 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 20404221213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404221217) 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, 3513856 + ... + 3519657.

It is an arithmetic number, because the mean of its divisors is an integer number (3404220776).

Almost surely, 2^20404221213 is an apocalyptic number.

It is an amenable number.

20404221213 is a deficient number, since it is larger than the sum of its proper divisors (6829544995).

20404221213 is an equidigital number, since it uses as much as digits as its factorization.

20404221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034483.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20404221213 its reverse (31212240402), we get a palindrome (51616461615).

The spelling of 20404221213 in words is "twenty billion, four hundred four million, two hundred twenty-one thousand, two hundred thirteen".