Base | Representation |
---|---|
bin | 100110001000… |
… | …0110110000000 |
3 | 1101121200210002 |
4 | 1030100312000 |
5 | 20104220221 |
6 | 1552255132 |
7 | 331633346 |
oct | 114206600 |
9 | 41550702 |
10 | 19991936 |
11 | 10315268 |
12 | 68414a8 |
13 | 41ac863 |
14 | 2925996 |
15 | 1b4d80b |
hex | 1310d80 |
19991936 has 32 divisors (see below), whose sum is σ = 40035000. Its totient is φ = 9944064.
The previous prime is 19991911. The next prime is 19991963. The reversal of 19991936 is 63919991.
It is a tau number, because it is divible by the number of its divisors (32).
It is a congruent number.
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, 39815 + ... + 40313.
Almost surely, 219991936 is an apocalyptic number.
19991936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
19991936 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
19991936 is an equidigital number, since it uses as much as digits as its factorization.
19991936 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 826 (or 814 counting only the distinct ones).
The product of its digits is 118098, while the sum is 47.
The square root of 19991936 is about 4471.2342814932. The cubic root of 19991936 is about 271.4052749825.
The spelling of 19991936 in words is "nineteen million, nine hundred ninety-one thousand, nine hundred thirty-six".
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