Search a number
-
+
20750 = 25383
BaseRepresentation
bin101000100001110
31001110112
411010032
51131000
6240022
7114332
oct50416
931415
1020750
1114654
1210012
1395a2
1477c2
156235
hex510e

20750 has 16 divisors (see below), whose sum is σ = 39312. Its totient is φ = 8200.

The previous prime is 20749. The next prime is 20753. The reversal of 20750 is 5702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209 + ... + 291.

It is an arithmetic number, because the mean of its divisors is an integer number (2457).

220750 is an apocalyptic number.

20750 is a deficient number, since it is larger than the sum of its proper divisors (18562).

20750 is an equidigital number, since it uses as much as digits as its factorization.

20750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 14.

The square root of 20750 is about 144.0486029089. The cubic root of 20750 is about 27.4793233005.

Subtracting from 20750 its sum of digits (14), we obtain a 4-th power (20736 = 124).

The spelling of 20750 in words is "twenty thousand, seven hundred fifty".

Divisors: 1 2 5 10 25 50 83 125 166 250 415 830 2075 4150 10375 20750