Base | Representation |
---|---|
bin | 100110011100… |
… | …0100111110010 |
3 | 1101220222021112 |
4 | 1030320213302 |
5 | 20124423431 |
6 | 1555553322 |
7 | 333212354 |
oct | 114704762 |
9 | 41828245 |
10 | 20154866 |
11 | 10416716 |
12 | 68bb842 |
13 | 4238a74 |
14 | 29690d4 |
15 | 1b81c2b |
hex | 13389f2 |
20154866 has 4 divisors (see below), whose sum is σ = 30232302. Its totient is φ = 10077432.
The previous prime is 20154859. The next prime is 20154881. The reversal of 20154866 is 66845102.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66845102 = 2 ⋅33422551.
It can be written as a sum of positive squares in only one way, i.e., 11363641 + 8791225 = 3371^2 + 2965^2 .
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 as a sum of consecutive naturals, namely, 5038715 + ... + 5038718.
Almost surely, 220154866 is an apocalyptic number.
20154866 is a deficient number, since it is larger than the sum of its proper divisors (10077436).
20154866 is a wasteful number, since it uses less digits than its factorization.
20154866 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10077435.
The product of its (nonzero) digits is 11520, while the sum is 32.
The square root of 20154866 is about 4489.4171113854. The cubic root of 20154866 is about 272.1405793639.
Adding to 20154866 its reverse (66845102), we get a palindrome (86999968).
The spelling of 20154866 in words is "twenty million, one hundred fifty-four thousand, eight hundred sixty-six".
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