21345514 has 8 divisors (see below), whose sum is σ = 32329440. Its totient is φ = 10569036.

The previous prime is 21345509. The next prime is 21345517. The reversal of 21345514 is 41554312.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (21345517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51604 + ... + 52015.

It is an arithmetic number, because the mean of its divisors is an integer number (4041180).

Almost surely, 2^21345514 is an apocalyptic number.

21345514 is a deficient number, since it is larger than the sum of its proper divisors (10983926).

21345514 is a wasteful number, since it uses less digits than its factorization.

21345514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103724.

The product of its digits is 2400, while the sum is 25.

The square root of 21345514 is about 4620.1205611975. The cubic root of 21345514 is about 277.3972847133.

Adding to 21345514 its reverse (41554312), we get a palindrome (62899826).

The spelling of 21345514 in words is "twenty-one million, three hundred forty-five thousand, five hundred fourteen".