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20230033 = 28171993
BaseRepresentation
bin100110100101…
…0111110010001
31102001210101111
41031022332101
520134330113
62001333321
7333644455
oct115127621
942053344
1020230033
111046813a
126937241
134264045
142988665
151b9913d
hex134af91

20230033 has 4 divisors (see below), whose sum is σ = 20302308. Its totient is φ = 20157760.

The previous prime is 20230031. The next prime is 20230037. The reversal of 20230033 is 33003202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17833729 + 2396304 = 4223^2 + 1548^2 .

It is a cyclic number.

It is not a de Polignac number, because 20230033 - 21 = 20230031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20229995 and 20230022.

It is not an unprimeable number, because it can be changed into a prime (20230031) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 35716 + ... + 36277.

It is an arithmetic number, because the mean of its divisors is an integer number (5075577).

Almost surely, 220230033 is an apocalyptic number.

It is an amenable number.

20230033 is a deficient number, since it is larger than the sum of its proper divisors (72275).

20230033 is an equidigital number, since it uses as much as digits as its factorization.

20230033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72274.

The product of its (nonzero) digits is 108, while the sum is 13.

The square root of 20230033 is about 4497.7808972870. The cubic root of 20230033 is about 272.4784731753.

Adding to 20230033 its reverse (33003202), we get a palindrome (53233235).

The spelling of 20230033 in words is "twenty million, two hundred thirty thousand, thirty-three".

Divisors: 1 281 71993 20230033