20101313 has 4 divisors (see below), whose sum is σ = 20355840. Its totient is φ = 19846788.

The previous prime is 20101309. The next prime is 20101331. The reversal of 20101313 is 31310102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31310102 = 2 ⋅15655051.

It is a cyclic number.

It is not a de Polignac number, because 20101313 - 2² = 20101309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101294 and 20101303.

It is not an unprimeable number, because it can be changed into a prime (20101013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127145 + ... + 127302.

It is an arithmetic number, because the mean of its divisors is an integer number (5088960).

Almost surely, 2^20101313 is an apocalyptic number.

It is an amenable number.

20101313 is a deficient number, since it is larger than the sum of its proper divisors (254527).

20101313 is an equidigital number, since it uses as much as digits as its factorization.

20101313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254526.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 20101313 is about 4483.4487841393. The cubic root of 20101313 is about 271.8993328818.

Adding to 20101313 its reverse (31310102), we get a palindrome (51411415).

The spelling of 20101313 in words is "twenty million, one hundred one thousand, three hundred thirteen".