20313332213 has 4 divisors (see below), whose sum is σ = 20314838028. Its totient is φ = 20311826400.

The previous prime is 20313332191. The next prime is 20313332219. The reversal of 20313332213 is 31223331302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31223331302 = 2 ⋅15611665651.

It can be written as a sum of positive squares in 2 ways, for example, as 2953161649 + 17360170564 = 54343^2 + 131758^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313332213 - 2¹⁰ = 20313331189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313332219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732488 + ... + 759713.

It is an arithmetic number, because the mean of its divisors is an integer number (5078709507).

Almost surely, 2^20313332213 is an apocalyptic number.

It is an amenable number.

20313332213 is a deficient number, since it is larger than the sum of its proper divisors (1505815).

20313332213 is a wasteful number, since it uses less digits than its factorization.

20313332213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505814.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20313332213 its reverse (31223331302), we get a palindrome (51536663515).

The spelling of 20313332213 in words is "twenty billion, three hundred thirteen million, three hundred thirty-two thousand, two hundred thirteen".