21514 has 8 divisors (see below), whose sum is σ = 33408. Its totient is φ = 10380.

The previous prime is 21503. The next prime is 21517. The reversal of 21514 is 41512.

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

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 21494 and 21503.

It is not an unprimeable number, because it can be changed into a prime (21517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112 + ... + 235.

It is an arithmetic number, because the mean of its divisors is an integer number (4176).

2²¹⁵¹⁴ is an apocalyptic number.

21514 is a deficient number, since it is larger than the sum of its proper divisors (11894).

21514 is a wasteful number, since it uses less digits than its factorization.

21514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its digits is 40, while the sum is 13.

The square root of 21514 is about 146.6765148209. The cubic root of 21514 is about 27.8125230400.

It can be divided in two parts, 21 and 514, that added together give a palindrome (535).

The spelling of 21514 in words is "twenty-one thousand, five hundred fourteen".