Search a number
-
+
20875037 = 132715731
BaseRepresentation
bin100111110100…
…0011100011101
31110021120011112
41033220130131
520321000122
62023231405
7342302111
oct117503435
943246145
1020875037
11108687a7
126ba8565
13442b7c1
142ab5741
151c752e2
hex13e871d

20875037 has 4 divisors (see below), whose sum is σ = 20892096. Its totient is φ = 20857980.

The previous prime is 20875033. The next prime is 20875051. The reversal of 20875037 is 73057802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20875037 - 22 = 20875033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20874994 and 20875012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6539 + ... + 9192.

It is an arithmetic number, because the mean of its divisors is an integer number (5223024).

Almost surely, 220875037 is an apocalyptic number.

It is an amenable number.

20875037 is a deficient number, since it is larger than the sum of its proper divisors (17059).

20875037 is a wasteful number, since it uses less digits than its factorization.

20875037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17058.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20875037 is about 4568.9207697223. The cubic root of 20875037 is about 275.3440849975.

The spelling of 20875037 in words is "twenty million, eight hundred seventy-five thousand, thirty-seven".

Divisors: 1 1327 15731 20875037