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20346 = 233391
BaseRepresentation
bin100111101111010
31000220120
410331322
51122341
6234110
7113214
oct47572
930816
1020346
1114317
12b936
139351
1475b4
156066
hex4f7a

20346 has 8 divisors (see below), whose sum is σ = 40704. Its totient is φ = 6780.

The previous prime is 20341. The next prime is 20347. The reversal of 20346 is 64302.

Subtracting from 20346 its product of nonzero digits (144), we obtain a palindrome (20202).

Adding to 20346 its reverse (64302), we get a palindrome (84648).

Subtracting 20346 from its reverse (64302), we obtain a triangular number (43956 = T296).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20341) 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, 1690 + ... + 1701.

It is an arithmetic number, because the mean of its divisors is an integer number (5088).

220346 is an apocalyptic number.

20346 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 (20352).

20346 is a wasteful number, since it uses less digits than its factorization.

20346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20346 is about 142.6394054951. The cubic root of 20346 is about 27.2998134941.

The spelling of 20346 in words is "twenty thousand, three hundred forty-six".

Divisors: 1 2 3 6 3391 6782 10173 20346