21320014 has 8 divisors (see below), whose sum is σ = 33663240. Its totient is φ = 10098936.

The previous prime is 21319997. The next prime is 21320021. The reversal of 21320014 is 41002312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21319976 and 21320003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280489 + ... + 280564.

It is an arithmetic number, because the mean of its divisors is an integer number (4207905).

Almost surely, 2^21320014 is an apocalyptic number.

21320014 is a deficient number, since it is larger than the sum of its proper divisors (12343226).

21320014 is a wasteful number, since it uses less digits than its factorization.

21320014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561074.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21320014 is about 4617.3600682641. The cubic root of 21320014 is about 277.2867782867.

Adding to 21320014 its reverse (41002312), we get a palindrome (62322326).

The spelling of 21320014 in words is "twenty-one million, three hundred twenty thousand, fourteen".