20323220313 has 16 divisors (see below), whose sum is σ = 29756823552. Its totient is φ = 12235530000.

The previous prime is 20323220273. The next prime is 20323220347. The reversal of 20323220313 is 31302232302.

It is not a de Polignac number, because 20323220313 - 2¹² = 20323216217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20323220313.

It is not an unprimeable number, because it can be changed into a prime (20323220413) 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, 2034273 + ... + 2044238.

It is an arithmetic number, because the mean of its divisors is an integer number (1859801472).

Almost surely, 2^20323220313 is an apocalyptic number.

It is an amenable number.

20323220313 is a deficient number, since it is larger than the sum of its proper divisors (9433603239).

20323220313 is a wasteful number, since it uses less digits than its factorization.

20323220313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078676.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20323220313 its reverse (31302232302), we get a palindrome (51625452615).

The spelling of 20323220313 in words is "twenty billion, three hundred twenty-three million, two hundred twenty thousand, three hundred thirteen".