20311330221 has 48 divisors (see below), whose sum is σ = 36156871296. Its totient is φ = 10699475328.

The previous prime is 20311330219. The next prime is 20311330223. The reversal of 20311330221 is 12203311302.

20311330221 is a `hidden beast` number, since 2 + 0 + 311 + 330 + 2 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (20311330219) and next prime (20311330223).

It is not a de Polignac number, because 20311330221 - 2¹ = 20311330219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20311330194 and 20311330203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311330223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 617046 + ... + 649128.

It is an arithmetic number, because the mean of its divisors is an integer number (753268152).

Almost surely, 2^20311330221 is an apocalyptic number.

20311330221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20311330221 is a deficient number, since it is larger than the sum of its proper divisors (15845541075).

20311330221 is a wasteful number, since it uses less digits than its factorization.

20311330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32882 (or 32879 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20311330221 its reverse (12203311302), we get a palindrome (32514641523).

The spelling of 20311330221 in words is "twenty billion, three hundred eleven million, three hundred thirty thousand, two hundred twenty-one".