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20311130 = 2571791621
BaseRepresentation
bin100110101111…
…0110001011010
31102012220122002
41031132301122
520144424010
62003201002
7334433060
oct115366132
942186562
1020311130
1110513064
126976162
134291c28
1429aa030
151bb31a5
hex135ec5a

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, 220311130 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".

Divisors: 1 2 5 7 10 14 35 70 179 358 895 1253 1621 1790 2506 3242 6265 8105 11347 12530 16210 22694 56735 113470 290159 580318 1450795 2031113 2901590 4062226 10155565 20311130