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20903041 = 53521757
BaseRepresentation
bin100111110111…
…1010010000001
31110022222120201
41033233102001
520322344131
62024005201
7342446545
oct117572201
943288521
1020903041
1110887845
127000801
13443b483
142ac1a25
151c7d761
hex13ef481

20903041 has 8 divisors (see below), whose sum is σ = 21366504. Its totient is φ = 20442240.

The previous prime is 20903027. The next prime is 20903089. The reversal of 20903041 is 14030902.

It can be written as a sum of positive squares in 4 ways, for example, as 4060225 + 16842816 = 2015^2 + 4104^2 .

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 20903041 - 25 = 20903009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20903741) 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 7 ways as a sum of consecutive naturals, for example, 27235 + ... + 27991.

It is an arithmetic number, because the mean of its divisors is an integer number (2670813).

Almost surely, 220903041 is an apocalyptic number.

It is an amenable number.

20903041 is a deficient number, since it is larger than the sum of its proper divisors (463463).

20903041 is an equidigital number, since it uses as much as digits as its factorization.

20903041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20903041 is about 4571.9843613031. The cubic root of 20903041 is about 275.4671552835.

Adding to 20903041 its reverse (14030902), we get a palindrome (34933943).

The spelling of 20903041 in words is "twenty million, nine hundred three thousand, forty-one".

Divisors: 1 53 521 757 27613 40121 394397 20903041