21304614 has 16 divisors (see below), whose sum is σ = 42654528. Its totient is φ = 7093992.

The previous prime is 21304603. The next prime is 21304627. The reversal of 21304614 is 41640312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9729 + ... + 11715.

It is an arithmetic number, because the mean of its divisors is an integer number (2665908).

Almost surely, 2^21304614 is an apocalyptic number.

21304614 is an abundant number, since it is smaller than the sum of its proper divisors (21349914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21304614 is a wasteful number, since it uses less digits than its factorization.

21304614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21304614 is about 4615.6921474466. The cubic root of 21304614 is about 277.2199983906.

Adding to 21304614 its reverse (41640312), we get a palindrome (62944926).

The spelling of 21304614 in words is "twenty-one million, three hundred four thousand, six hundred fourteen".