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20130211018 = 2231393148297
BaseRepresentation
bin10010101111110110…
…101010010011001010
31220221220112200012001
4102233312222103022
5312211313223033
613125300141214
71311562653601
oct225766522312
956856480161
1020130211018
11859aa85535
123a9969780a
131b8a668488
14d8d6dca38
157cc3dbe7d
hex4afdaa4ca

20130211018 has 16 divisors (see below), whose sum is σ = 31734843840. Its totient is φ = 9558226656.

The previous prime is 20130211007. The next prime is 20130211019. The reversal of 20130211018 is 81011203102.

It is a junction number, because it is equal to n+sod(n) for n = 20130210986 and 20130211004.

It is not an unprimeable number, because it can be changed into a prime (20130211019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1567755 + ... + 1580542.

It is an arithmetic number, because the mean of its divisors is an integer number (1983427740).

Almost surely, 220130211018 is an apocalyptic number.

20130211018 is a deficient number, since it is larger than the sum of its proper divisors (11604632822).

20130211018 is a wasteful number, since it uses less digits than its factorization.

20130211018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3148461.

The product of its (nonzero) digits is 96, while the sum is 19.

The spelling of 20130211018 in words is "twenty billion, one hundred thirty million, two hundred eleven thousand, eighteen".

Divisors: 1 2 23 46 139 278 3197 6394 3148297 6296594 72410831 144821662 437613283 875226566 10065105509 20130211018