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20212012 = 226417883
BaseRepresentation
bin100110100011…
…0100100101100
31102000212200001
41031012210230
520133241022
62001114044
7333541102
oct115064454
942025601
1020212012
1110455647
126928924
134258a92
142981c72
151b93b27
hex134692c

20212012 has 12 divisors (see below), whose sum is σ = 35430696. Its totient is φ = 10088960.

The previous prime is 20212001. The next prime is 20212013. The reversal of 20212012 is 21021202.

It is a self number, because there is not a number n which added to its sum of digits gives 20212012.

It is not an unprimeable number, because it can be changed into a prime (20212013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378 + ... + 6505.

It is an arithmetic number, because the mean of its divisors is an integer number (2952558).

Almost surely, 220212012 is an apocalyptic number.

It is an amenable number.

20212012 is a deficient number, since it is larger than the sum of its proper divisors (15218684).

20212012 is a wasteful number, since it uses less digits than its factorization.

20212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8528 (or 8526 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20212012 is about 4495.7771297074. Note that the first 3 decimals coincide. The cubic root of 20212012 is about 272.3975408088.

Adding to 20212012 its reverse (21021202), we get a palindrome (41233214).

The spelling of 20212012 in words is "twenty million, two hundred twelve thousand, twelve".

Divisors: 1 2 4 641 1282 2564 7883 15766 31532 5053003 10106006 20212012