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20011112 = 2311227399
BaseRepresentation
bin100110001010…
…1100001101000
31101122200002022
41030111201220
520110323422
61552524012
7332043302
oct114254150
941580068
1020011112
1110328710
126850608
1341b84c4
14292c972
151b54342
hex1315868

20011112 has 16 divisors (see below), whose sum is σ = 40932000. Its totient is φ = 9095920.

The previous prime is 20011099. The next prime is 20011139. The reversal of 20011112 is 21111002.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20011112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113612 + ... + 113787.

It is an arithmetic number, because the mean of its divisors is an integer number (2558250).

Almost surely, 220011112 is an apocalyptic number.

20011112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20011112 is an abundant number, since it is smaller than the sum of its proper divisors (20920888).

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

20011112 is a wasteful number, since it uses less digits than its factorization.

20011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227416 (or 227412 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 20011112 is about 4473.3781418521. The cubic root of 20011112 is about 271.4920233664.

Adding to 20011112 its reverse (21111002), we get a palindrome (41122114).

It can be divided in two parts, 2001 and 1112, that added together give a palindrome (3113).

The spelling of 20011112 in words is "twenty million, eleven thousand, one hundred twelve".

Divisors: 1 2 4 8 11 22 44 88 227399 454798 909596 1819192 2501389 5002778 10005556 20011112