20221320031313 has 8 divisors (see below), whose sum is σ = 20828967844776. Its totient is φ = 19619121974400.

The previous prime is 20221320031291. The next prime is 20221320031351. The reversal of 20221320031313 is 31313002312202.

It can be written as a sum of positive squares in 4 ways, for example, as 4730420552209 + 15490899479104 = 2174953^2 + 3935848^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20221320031313 - 2⁸ = 20221320031057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221320031813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1362431606 + ... + 1362446447.

It is an arithmetic number, because the mean of its divisors is an integer number (2603620980597).

Almost surely, 2^{20221320031313} is an apocalyptic number.

It is an amenable number.

20221320031313 is a deficient number, since it is larger than the sum of its proper divisors (607647813463).

20221320031313 is a wasteful number, since it uses less digits than its factorization.

20221320031313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724878275.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20221320031313 its reverse (31313002312202), we get a palindrome (51534322343515).

The spelling of 20221320031313 in words is "twenty trillion, two hundred twenty-one billion, three hundred twenty million, thirty-one thousand, three hundred thirteen".