20313130 has 16 divisors (see below), whose sum is σ = 38714760. Its totient is φ = 7647232.

The previous prime is 20313121. The next prime is 20313133. The reversal of 20313130 is 3131302.

It can be written as a sum of positive squares in 4 ways, for example, as 15848361 + 4464769 = 3981^2 + 2113^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20313130.

It is not an unprimeable number, because it can be changed into a prime (20313133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59575 + ... + 59914.

Almost surely, 2^20313130 is an apocalyptic number.

20313130 is a deficient number, since it is larger than the sum of its proper divisors (18401630).

20313130 is a wasteful number, since it uses less digits than its factorization.

20313130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119513.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 20313130 is about 4507.0089860128. The cubic root of 20313130 is about 272.8510415670.

Adding to 20313130 its reverse (3131302), we get a palindrome (23444432).

The spelling of 20313130 in words is "twenty million, three hundred thirteen thousand, one hundred thirty".