21320614 has 16 divisors (see below), whose sum is σ = 36875808. Its totient is φ = 9055872.

The previous prime is 21320581. The next prime is 21320639. The reversal of 21320614 is 41602312.

It is a junction number, because it is equal to n+sod(n) for n = 21320591 and 21320600.

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, 5157 + ... + 8320.

It is an arithmetic number, because the mean of its divisors is an integer number (2304738).

Almost surely, 2^21320614 is an apocalyptic number.

21320614 is a deficient number, since it is larger than the sum of its proper divisors (15555194).

21320614 is a wasteful number, since it uses less digits than its factorization.

21320614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13599.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 21320614 is about 4617.4250399979. The cubic root of 21320614 is about 277.2893794499.

Adding to 21320614 its reverse (41602312), we get a palindrome (62922926).

The spelling of 21320614 in words is "twenty-one million, three hundred twenty thousand, six hundred fourteen".