Search a number
-
+
20965818 = 233494303
BaseRepresentation
bin100111111111…
…0100110111010
31110110011200210
41033332212322
520331401233
62025211550
7343130556
oct117764672
943404623
1020965818
111091aa25
127030bb6
134460c13
142ada866
151c92163
hex13fe9ba

20965818 has 8 divisors (see below), whose sum is σ = 41931648. Its totient is φ = 6988604.

The previous prime is 20965817. The next prime is 20965829. The reversal of 20965818 is 81856902.

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

20965818 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20965817) 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 3 ways as a sum of consecutive naturals, for example, 1747146 + ... + 1747157.

It is an arithmetic number, because the mean of its divisors is an integer number (5241456).

Almost surely, 220965818 is an apocalyptic number.

20965818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20965818 is a wasteful number, since it uses less digits than its factorization.

20965818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3494308.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 20965818 is about 4578.8446140921. The cubic root of 20965818 is about 275.7426450032.

The spelling of 20965818 in words is "twenty million, nine hundred sixty-five thousand, eight hundred eighteen".

Divisors: 1 2 3 6 3494303 6988606 10482909 20965818