20311130 has 32 divisors (see below), whose sum is σ = 42042240. Its totient is φ = 6920640.

The previous prime is 20311129. The next prime is 20311177. The reversal of 20311130 is 3111302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11720 + ... + 13340.

It is an arithmetic number, because the mean of its divisors is an integer number (1313820).

Almost surely, 2^20311130 is an apocalyptic number.

20311130 is an abundant number, since it is smaller than the sum of its proper divisors (21731110).

20311130 is a wasteful number, since it uses less digits than its factorization.

20311130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 20311130 is about 4506.7871039134. The cubic root of 20311130 is about 272.8420864397.

Adding to 20311130 its reverse (3111302), we get a palindrome (23422432).

The spelling of 20311130 in words is "twenty million, three hundred eleven thousand, one hundred thirty".