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20312041 = 109307607
BaseRepresentation
bin100110101111…
…0111111101001
31102012221212211
41031132333221
520144441131
62003205121
7334435531
oct115367751
942187784
1020312041
1110513812
1269767a1
134292479
1429aa4c1
151bb35b1
hex135efe9

20312041 has 8 divisors (see below), whose sum is σ = 20599040. Its totient is φ = 20027088.

The previous prime is 20312021. The next prime is 20312053. The reversal of 20312041 is 14021302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20312041 - 219 = 19787753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33160 + ... + 33766.

It is an arithmetic number, because the mean of its divisors is an integer number (2574880).

Almost surely, 220312041 is an apocalyptic number.

It is an amenable number.

20312041 is a deficient number, since it is larger than the sum of its proper divisors (286999).

20312041 is a wasteful number, since it uses less digits than its factorization.

20312041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20312041 is about 4506.8881725643. Note that the first 3 decimals coincide. The cubic root of 20312041 is about 272.8461655730.

Adding to 20312041 its reverse (14021302), we get a palindrome (34333343).

The spelling of 20312041 in words is "twenty million, three hundred twelve thousand, forty-one".

Divisors: 1 109 307 607 33463 66163 186349 20312041