20317011 has 24 divisors (see below), whose sum is σ = 32008896. Its totient is φ = 11363040.

The previous prime is 20316991. The next prime is 20317021. The reversal of 20317011 is 11071302.

It is not a de Polignac number, because 20317011 - 2⁷ = 20316883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20317021) 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 23 ways as a sum of consecutive naturals, for example, 3756 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (1333704).

Almost surely, 2^20317011 is an apocalyptic number.

20317011 is a deficient number, since it is larger than the sum of its proper divisors (11691885).

20317011 is a wasteful number, since it uses less digits than its factorization.

20317011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683 (or 3670 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 20317011 is about 4507.4395170651. The cubic root of 20317011 is about 272.8684173146.

Adding to 20317011 its reverse (11071302), we get a palindrome (31388313).

The spelling of 20317011 in words is "twenty million, three hundred seventeen thousand, eleven".