Search a number
-
+
20831426 = 27111773109
BaseRepresentation
bin100111101110…
…1110011000010
31110012100100022
41033131303002
520313101201
62022253442
7342031010
oct117356302
943170308
1020831426
1110838a60
126b87282
1344149b5
142aa38b0
151c6741b
hex13ddcc2

20831426 has 64 divisors (see below), whose sum is σ = 42197760. Its totient is φ = 7464960.

The previous prime is 20831323. The next prime is 20831533. The reversal of 20831426 is 62413802.

It is a lonely number, since its distance to closest prime (20831323) sets a new record.

It is a junction number, because it is equal to n+sod(n) for n = 20831395 and 20831404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191060 + ... + 191168.

It is an arithmetic number, because the mean of its divisors is an integer number (659340).

Almost surely, 220831426 is an apocalyptic number.

20831426 is an abundant number, since it is smaller than the sum of its proper divisors (21366334).

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

20831426 is a wasteful number, since it uses less digits than its factorization.

20831426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20831426 is about 4564.1457031957. The cubic root of 20831426 is about 275.1522066504.

The spelling of 20831426 in words is "twenty million, eight hundred thirty-one thousand, four hundred twenty-six".

Divisors: 1 2 7 11 14 17 22 34 73 77 109 119 146 154 187 218 238 374 511 763 803 1022 1199 1241 1309 1526 1606 1853 2398 2482 2618 3706 5621 7957 8393 8687 11242 12971 13651 15914 16786 17374 20383 25942 27302 40766 55699 87527 95557 111398 135269 142681 175054 191114 270538 285362 612689 946883 1225378 1487959 1893766 2975918 10415713 20831426