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21014 = 271979
BaseRepresentation
bin101001000010110
31001211022
411020112
51133024
6241142
7115160
oct51026
931738
1021014
1114874
12101b2
139746
147930
15635e
hex5216

21014 has 16 divisors (see below), whose sum is σ = 38400. Its totient is φ = 8424.

The previous prime is 21013. The next prime is 21017. The reversal of 21014 is 41012.

21014 is nontrivially palindromic in base 6.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 20992 and 21010.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 21014.

It is not an unprimeable number, because it can be changed into a prime (21011) 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, 227 + ... + 305.

It is an arithmetic number, because the mean of its divisors is an integer number (2400).

221014 is an apocalyptic number.

21014 is a deficient number, since it is larger than the sum of its proper divisors (17386).

21014 is a wasteful number, since it uses less digits than its factorization.

21014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 21014 is about 144.9620640030. The cubic root of 21014 is about 27.5953713445.

Adding to 21014 its reverse (41012), we get a palindrome (62026).

The spelling of 21014 in words is "twenty-one thousand, fourteen", and thus it is an iban number.

Divisors: 1 2 7 14 19 38 79 133 158 266 553 1106 1501 3002 10507 21014