20317130 has 8 divisors (see below), whose sum is σ = 36570852. Its totient is φ = 8126848.

The previous prime is 20317127. The next prime is 20317163. The reversal of 20317130 is 3171302.

It can be written as a sum of positive squares in 2 ways, for example, as 18671041 + 1646089 = 4321^2 + 1283^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20317099 and 20317108.

It is an unprimeable number.

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, 1015847 + ... + 1015866.

Almost surely, 2^20317130 is an apocalyptic number.

20317130 is a deficient number, since it is larger than the sum of its proper divisors (16253722).

20317130 is a wasteful number, since it uses less digits than its factorization.

20317130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031720.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 20317130 is about 4507.4527174447. The cubic root of 20317130 is about 272.8689500582.

Adding to 20317130 its reverse (3171302), we get a palindrome (23488432).

The spelling of 20317130 in words is "twenty million, three hundred seventeen thousand, one hundred thirty".