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20694 = 233449
BaseRepresentation
bin101000011010110
31001101110
411003112
51130234
6235450
7114222
oct50326
931343
1020694
1114603
12bb86
13955b
147782
1561e9
hex50d6

20694 has 8 divisors (see below), whose sum is σ = 41400. Its totient is φ = 6896.

The previous prime is 20693. The next prime is 20707. The reversal of 20694 is 49602.

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

20694 is an admirable number.

It is a Curzon number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 20694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1719 + ... + 1730.

It is an arithmetic number, because the mean of its divisors is an integer number (5175).

220694 is an apocalyptic number.

20694 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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20700).

20694 is a wasteful number, since it uses less digits than its factorization.

20694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20694 is about 143.8540927468. The cubic root of 20694 is about 27.4545806736.

It can be divided in two parts, 206 and 94, that added together give a triangular number (300 = T24).

The spelling of 20694 in words is "twenty thousand, six hundred ninety-four".

Divisors: 1 2 3 6 3449 6898 10347 20694