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19000206 = 2321055567
BaseRepresentation
bin100100001111…
…0101110001110
31022202022101100
41020132232032
514331001311
61515123530
7320333121
oct110365616
938668340
1019000206
11a7a8155
1264435a6
133c23334
1427483b8
151a04a56
hex121eb8e

19000206 has 12 divisors (see below), whose sum is σ = 41167152. Its totient is φ = 6333396.

The previous prime is 19000187. The next prime is 19000213. The reversal of 19000206 is 60200091.

It is a super-2 number, since 2×190002062 = 722015656084872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1055567 = 19000206 / (1 + 9 + 0 + 0 + 0 + 2 + 0 + 6).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 527766 + ... + 527801.

It is an arithmetic number, because the mean of its divisors is an integer number (3430596).

Almost surely, 219000206 is an apocalyptic number.

19000206 is an abundant number, since it is smaller than the sum of its proper divisors (22166946).

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

19000206 is a wasteful number, since it uses less digits than its factorization.

19000206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055575 (or 1055572 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 19000206 is about 4358.9225732972. The cubic root of 19000206 is about 266.8411292384.

Adding to 19000206 its reverse (60200091), we get a palindrome (79200297).

The spelling of 19000206 in words is "nineteen million, two hundred six", and thus it is an aban number.

Divisors: 1 2 3 6 9 18 1055567 2111134 3166701 6333402 9500103 19000206