Search a number
-
+
20675 = 52827
BaseRepresentation
bin101000011000011
31001100202
411003003
51130200
6235415
7114164
oct50303
931322
1020675
1114596
12bb6b
139545
14776b
1561d5
hex50c3

20675 has 6 divisors (see below), whose sum is σ = 25668. Its totient is φ = 16520.

The previous prime is 20663. The next prime is 20681. The reversal of 20675 is 57602.

20675 = T80 + T81 + ... + T85.

It is not a de Polignac number, because 20675 - 26 = 20611 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 389 + ... + 438.

It is an arithmetic number, because the mean of its divisors is an integer number (4278).

220675 is an apocalyptic number.

20675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20675 is a deficient number, since it is larger than the sum of its proper divisors (4993).

20675 is an equidigital number, since it uses as much as digits as its factorization.

20675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20675 is about 143.7880384455. The cubic root of 20675 is about 27.4461757131.

The spelling of 20675 in words is "twenty thousand, six hundred seventy-five".

Divisors: 1 5 25 827 4135 20675