20130116 has 6 divisors (see below), whose sum is σ = 35227710. Its totient is φ = 10065056.

The previous prime is 20130079. The next prime is 20130163. The reversal of 20130116 is 61103102.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 1811716 = 4280^2 + 1346^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20130116.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2516261 + ... + 2516268.

It is an arithmetic number, because the mean of its divisors is an integer number (5871285).

Almost surely, 2^20130116 is an apocalyptic number.

It is an amenable number.

20130116 is a deficient number, since it is larger than the sum of its proper divisors (15097594).

20130116 is a wasteful number, since it uses less digits than its factorization.

20130116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032533 (or 5032531 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 20130116 is about 4486.6597820650. The cubic root of 20130116 is about 272.0291383144.

Adding to 20130116 its reverse (61103102), we get a palindrome (81233218).

The spelling of 20130116 in words is "twenty million, one hundred thirty thousand, one hundred sixteen".