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18629 = 131433
BaseRepresentation
bin100100011000101
3221112222
410203011
51044004
6222125
7105212
oct44305
927488
1018629
1112aa6
12a945
138630
146b09
1557be
hex48c5

18629 has 4 divisors (see below), whose sum is σ = 20076. Its totient is φ = 17184.

The previous prime is 18617. The next prime is 18637. The reversal of 18629 is 92681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9025 + 9604 = 95^2 + 98^2 .

It is a cyclic number.

It is not a de Polignac number, because 18629 - 212 = 14533 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 13.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 18598 and 18607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18679) 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, 704 + ... + 729.

It is an arithmetic number, because the mean of its divisors is an integer number (5019).

218629 is an apocalyptic number.

It is an amenable number.

18629 is a deficient number, since it is larger than the sum of its proper divisors (1447).

18629 is a wasteful number, since it uses less digits than its factorization.

18629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446.

The product of its digits is 864, while the sum is 26.

The square root of 18629 is about 136.4880947189. The cubic root of 18629 is about 26.5091934401.

The spelling of 18629 in words is "eighteen thousand, six hundred twenty-nine".

Divisors: 1 13 1433 18629