Search a number
-
+
20655317 = 59934483
BaseRepresentation
bin100111011001…
…0110011010101
31102212101202202
41032302303111
520241432232
62014414245
7340365404
oct116626325
942771682
1020655317
1110728711
126b01385
1343827a7
142a5963b
151c30162
hex13b2cd5

20655317 has 4 divisors (see below), whose sum is σ = 20690400. Its totient is φ = 20620236.

The previous prime is 20655301. The next prime is 20655329. The reversal of 20655317 is 71355602.

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 20655317 - 24 = 20655301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20655317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20655367) 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, 16643 + ... + 17840.

It is an arithmetic number, because the mean of its divisors is an integer number (5172600).

Almost surely, 220655317 is an apocalyptic number.

It is an amenable number.

20655317 is a deficient number, since it is larger than the sum of its proper divisors (35083).

20655317 is an equidigital number, since it uses as much as digits as its factorization.

20655317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35082.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 20655317 is about 4544.8120973259. The cubic root of 20655317 is about 274.3746318421.

The spelling of 20655317 in words is "twenty million, six hundred fifty-five thousand, three hundred seventeen".

Divisors: 1 599 34483 20655317