20111130 has 48 divisors (see below), whose sum is σ = 56314440. Its totient is φ = 4950144.

The previous prime is 20111093. The next prime is 20111137. The reversal of 20111130 is 3111102.

It can be written as a sum of positive squares in 4 ways, for example, as 17114769 + 2996361 = 4137^2 + 1731^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20111137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7425 + ... + 9764.

Almost surely, 2^20111130 is an apocalyptic number.

20111130 is an abundant number, since it is smaller than the sum of its proper divisors (36203310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111130 is a wasteful number, since it uses less digits than its factorization.

20111130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17215 (or 17212 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 20111130 is about 4484.5434550242. The cubic root of 20111130 is about 271.9435887195.

Adding to 20111130 its reverse (3111102), we get a palindrome (23222232).

The spelling of 20111130 in words is "twenty million, one hundred eleven thousand, one hundred thirty".