20213123313 has 4 divisors (see below), whose sum is σ = 26950831088. Its totient is φ = 13475415540.

The previous prime is 20213123303. The next prime is 20213123351. The reversal of 20213123313 is 31332131202.

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 not a de Polignac number, because 20213123313 - 2⁸ = 20213123057 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 20213123313.

It is not an unprimeable number, because it can be changed into a prime (20213123303) 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, 3368853883 + ... + 3368853888.

It is an arithmetic number, because the mean of its divisors is an integer number (6737707772).

Almost surely, 2^20213123313 is an apocalyptic number.

It is an amenable number.

20213123313 is a deficient number, since it is larger than the sum of its proper divisors (6737707775).

20213123313 is an equidigital number, since it uses as much as digits as its factorization.

20213123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6737707774.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20213123313 its reverse (31332131202), we get a palindrome (51545254515).

The spelling of 20213123313 in words is "twenty billion, two hundred thirteen million, one hundred twenty-three thousand, three hundred thirteen".