Base | Representation |
---|---|
bin | 10010100111100111… |
… | …011011100100100000 |
3 | 1220121021110212102002 |
4 | 102213213123210200 |
5 | 311420423011200 |
6 | 13103441543132 |
7 | 1305264126422 |
oct | 224747334440 |
9 | 56537425362 |
10 | 19992000800 |
11 | 8529a66112 |
12 | 3a5b344aa8 |
13 | 1b67b36995 |
14 | d79202812 |
15 | 7c01dabd5 |
hex | 4a79db920 |
19992000800 has 54 divisors (see below), whose sum is σ = 48815236953. Its totient is φ = 7995200640.
The previous prime is 19992000767. The next prime is 19992000817. The reversal of 19992000800 is 800029991.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 2 ways, for example, as 19592160784 + 399840016 = 139972^2 + 19996^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=99980.
It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.
It is a Duffinian number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3996701 + ... + 4001699.
Almost surely, 219992000800 is an apocalyptic number.
19992000800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
19992000800 is an abundant number, since it is smaller than the sum of its proper divisors (28823236153).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
19992000800 is an frugal number, since it uses more digits than its factorization.
19992000800 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10018 (or 5006 counting only the distinct ones).
The product of its (nonzero) digits is 11664, while the sum is 38.
The spelling of 19992000800 in words is "nineteen billion, nine hundred ninety-two million, eight hundred", and thus it is an aban number.
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