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19629 = 33727
BaseRepresentation
bin100110010101101
3222221000
410302231
51112004
6230513
7111141
oct46255
928830
1019629
1113825
12b439
138c1c
147221
155c39

19629 has 8 divisors (see below), whose sum is σ = 29120. Its totient is φ = 13068.

The previous prime is 19609. The next prime is 19661. The reversal of 19629 is 92691.

19629 divided by its sum of digits (27) gives a palindrome (727).

It can be divided in two parts, 196 and 29, that added together give a square (225 = 152).

It is a happy number.

19629 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 19629 - 25 = 19597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 727 = 19629 / (1 + 9 + 6 + 2 + 9).

It is an Ulam number.

It is a Duffinian number.

19629 is a lucky number.

It is a nialpdrome in base 3 and base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19609) 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, 337 + ... + 390.

It is an arithmetic number, because the mean of its divisors is an integer number (3640).

19629 is a Friedman number, since it can be written as (2+1)^9-9*6, using all its digits and the basic arithmetic operations.

219629 is an apocalyptic number.

It is an amenable number.

19629 is a deficient number, since it is larger than the sum of its proper divisors (9491).

19629 is an equidigital number, since it uses as much as digits as its factorization.

19629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 730 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 19629 is about 140.1035331460. The cubic root of 19629 is about 26.9752860274.

The spelling of 19629 in words is "nineteen thousand, six hundred twenty-nine".

Divisors: 1 3 9 27 727 2181 6543 19629