21420314 has 8 divisors (see below), whose sum is σ = 33527520. Its totient is φ = 10244476.

The previous prime is 21420293. The next prime is 21420331. The reversal of 21420314 is 41302412.

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 = 21420292 and 21420301.

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, 232784 + ... + 232875.

It is an arithmetic number, because the mean of its divisors is an integer number (4190940).

Almost surely, 2^21420314 is an apocalyptic number.

21420314 is a deficient number, since it is larger than the sum of its proper divisors (12107206).

21420314 is a wasteful number, since it uses less digits than its factorization.

21420314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465684.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21420314 is about 4628.2085086997. The cubic root of 21420314 is about 277.7209300320.

Adding to 21420314 its reverse (41302412), we get a palindrome (62722726).

The spelling of 21420314 in words is "twenty-one million, four hundred twenty thousand, three hundred fourteen".