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20120212 = 227718579
BaseRepresentation
bin100110011000…
…0001010010100
31101212012202001
41030300022110
520122321322
61555125044
7333006340
oct114601224
941765661
1020120212
11103a2682
1268a3784
134226068
14295a620
151b76827
hex1330294

20120212 has 12 divisors (see below), whose sum is σ = 40240480. Its totient is φ = 8622936.

The previous prime is 20120207. The next prime is 20120213. The reversal of 20120212 is 21202102.

20120212 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359262 + ... + 359317.

Almost surely, 220120212 is an apocalyptic number.

It is an amenable number.

20120212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20120212 is a wasteful number, since it uses less digits than its factorization.

20120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718590 (or 718588 counting only the distinct ones).

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

The square root of 20120212 is about 4485.5559298709. Note that the first 3 decimals coincide. The cubic root of 20120212 is about 271.9845182941.

Adding to 20120212 its reverse (21202102), we get a palindrome (41322314).

The spelling of 20120212 in words is "twenty million, one hundred twenty thousand, two hundred twelve".

Divisors: 1 2 4 7 14 28 718579 1437158 2874316 5030053 10060106 20120212