20313213 has 4 divisors (see below), whose sum is σ = 27084288. Its totient is φ = 13542140.

The previous prime is 20313203. The next prime is 20313229. The reversal of 20313213 is 31231302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20313213 - 2⁴ = 20313197 is a prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 20313192 and 20313201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313203) 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, 3385533 + ... + 3385538.

It is an arithmetic number, because the mean of its divisors is an integer number (6771072).

Almost surely, 2^20313213 is an apocalyptic number.

It is an amenable number.

20313213 is a deficient number, since it is larger than the sum of its proper divisors (6771075).

20313213 is an equidigital number, since it uses as much as digits as its factorization.

20313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771074.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 20313213 is about 4507.0181938838. The cubic root of 20313213 is about 272.8514131920.

Adding to 20313213 its reverse (31231302), we get a palindrome (51544515).

The spelling of 20313213 in words is "twenty million, three hundred thirteen thousand, two hundred thirteen".