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20013230212 = 22172379161977
BaseRepresentation
bin10010101000111000…
…011010100010000100
31220122202102102200121
4102220320122202010
5311441341331322
613105520551324
71305642435643
oct225070324204
956582372617
1020013230212
11853aa46088
123a66482544
131b6c35a871
14d7bd6b35a
157c1ed0ec7
hex4a8e1a884

20013230212 has 48 divisors (see below), whose sum is σ = 39185717760. Its totient is φ = 8894426112.

The previous prime is 20013230203. The next prime is 20013230219. The reversal of 20013230212 is 21203231002.

It is not an unprimeable number, because it can be changed into a prime (20013230219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42568 + ... + 204544.

It is an arithmetic number, because the mean of its divisors is an integer number (816369120).

Almost surely, 220013230212 is an apocalyptic number.

It is an amenable number.

20013230212 is a deficient number, since it is larger than the sum of its proper divisors (19172487548).

20013230212 is a wasteful number, since it uses less digits than its factorization.

20013230212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162100 (or 162098 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20013230212 its reverse (21203231002), we get a palindrome (41216461214).

The spelling of 20013230212 in words is "twenty billion, thirteen million, two hundred thirty thousand, two hundred twelve".

Divisors: 1 2 4 17 23 34 46 68 79 92 158 316 391 782 1343 1564 1817 2686 3634 5372 7268 30889 61778 123556 161977 323954 647908 2753609 3725471 5507218 7450942 11014436 12796183 14901884 25592366 51184732 63333007 126666014 217535111 253332028 294312209 435070222 588624418 870140444 1177248836 5003307553 10006615106 20013230212