20302013221 has 16 divisors (see below), whose sum is σ = 24621465600. Its totient is φ = 16363000368.

The previous prime is 20302013203. The next prime is 20302013261. The reversal of 20302013221 is 12231020302.

It is a cyclic number.

It is not a de Polignac number, because 20302013221 - 2⁵ = 20302013189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20302013195 and 20302013204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302013201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1059141 + ... + 1078138.

It is an arithmetic number, because the mean of its divisors is an integer number (1538841600).

Almost surely, 2^20302013221 is an apocalyptic number.

It is an amenable number.

20302013221 is a deficient number, since it is larger than the sum of its proper divisors (4319452379).

20302013221 is a wasteful number, since it uses less digits than its factorization.

20302013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137368.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20302013221 its reverse (12231020302), we get a palindrome (32533033523).

The spelling of 20302013221 in words is "twenty billion, three hundred two million, thirteen thousand, two hundred twenty-one".