21313514 has 8 divisors (see below), whose sum is σ = 32512320. Its totient is φ = 10476076.

The previous prime is 21313493. The next prime is 21313531. The reversal of 21313514 is 41531312.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90194 + ... + 90429.

It is an arithmetic number, because the mean of its divisors is an integer number (4064040).

Almost surely, 2^21313514 is an apocalyptic number.

21313514 is a deficient number, since it is larger than the sum of its proper divisors (11198806).

21313514 is a wasteful number, since it uses less digits than its factorization.

21313514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180684.

The product of its digits is 360, while the sum is 20.

The square root of 21313514 is about 4616.6561492058. The cubic root of 21313514 is about 277.2585958904.

Adding to 21313514 its reverse (41531312), we get a palindrome (62844826).

The spelling of 21313514 in words is "twenty-one million, three hundred thirteen thousand, five hundred fourteen".