Base | Representation |
---|---|
bin | 101000101110… |
… | …0111001010111 |
3 | 1111011210110200 |
4 | 1101130321113 |
5 | 20431231043 |
6 | 2041351543 |
7 | 346326540 |
oct | 121347127 |
9 | 44153420 |
10 | 21352023 |
11 | 11064100 |
12 | 71985b3 |
13 | 4567944 |
14 | 2b9b4c7 |
15 | 1d1b7d3 |
hex | 145ce57 |
21352023 has 36 divisors (see below), whose sum is σ = 38757264. Its totient is φ = 11088000.
The previous prime is 21352007. The next prime is 21352031. The reversal of 21352023 is 32025312.
It is not a de Polignac number, because 21352023 - 24 = 21352007 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 21351987 and 21352005.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21352223) by changing a digit.
It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6223 + ... + 9023.
Almost surely, 221352023 is an apocalyptic number.
21352023 is a deficient number, since it is larger than the sum of its proper divisors (17405241).
21352023 is a wasteful number, since it uses less digits than its factorization.
21352023 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2836 (or 2822 counting only the distinct ones).
The product of its (nonzero) digits is 360, while the sum is 18.
The square root of 21352023 is about 4620.8249263524. The cubic root of 21352023 is about 277.4254779194.
Adding to 21352023 its reverse (32025312), we get a palindrome (53377335).
Subtracting 21352023 from its reverse (32025312), we obtain a square (10673289 = 32672).
The spelling of 21352023 in words is "twenty-one million, three hundred fifty-two thousand, twenty-three".
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