20313011 has 4 divisors (see below), whose sum is σ = 21507912. Its totient is φ = 19118112.

The previous prime is 20313001. The next prime is 20313047. The reversal of 20313011 is 11031302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11031302 = 2 ⋅5515651.

It is a cyclic number.

It is not a de Polignac number, because 20313011 - 2¹⁸ = 20050867 is a prime.

It is a super-2 number, since 2×20313011² = 825236831772242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312983 and 20313001.

It is not an unprimeable number, because it can be changed into a prime (20313001) 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, 597425 + ... + 597458.

It is an arithmetic number, because the mean of its divisors is an integer number (5376978).

Almost surely, 2^20313011 is an apocalyptic number.

20313011 is a deficient number, since it is larger than the sum of its proper divisors (1194901).

20313011 is a wasteful number, since it uses less digits than its factorization.

20313011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194900.

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

The square root of 20313011 is about 4506.9957843335. The cubic root of 20313011 is about 272.8505087533.

Adding to 20313011 its reverse (11031302), we get a palindrome (31344313).

It can be divided in two parts, 2031301 and 1, that added together give a palindrome (2031302).

The spelling of 20313011 in words is "twenty million, three hundred thirteen thousand, eleven".