20317125 has 32 divisors (see below), whose sum is σ = 35807616. Its totient is φ = 10195200.

The previous prime is 20317093. The next prime is 20317127. The reversal of 20317125 is 52171302.

20317125 is a nontrivial binomial coefficient, being equal to C(6375, 2).

It is not a de Polignac number, because 20317125 - 2⁵ = 20317093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20317127) 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 31 ways as a sum of consecutive naturals, for example, 4782 + ... + 7968.

It is an arithmetic number, because the mean of its divisors is an integer number (1118988).

Almost surely, 2^20317125 is an apocalyptic number.

20317125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20317125 is the 6374-th triangular number.

It is an amenable number.

20317125 is a deficient number, since it is larger than the sum of its proper divisors (15490491).

20317125 is a wasteful number, since it uses less digits than its factorization.

20317125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222 (or 3212 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20317125 is about 4507.4521628077. The cubic root of 20317125 is about 272.8689276741.

Adding to 20317125 its reverse (52171302), we get a palindrome (72488427).

The spelling of 20317125 in words is "twenty million, three hundred seventeen thousand, one hundred twenty-five".