21343386 has 16 divisors (see below), whose sum is σ = 43324704. Its totient is φ = 7008144.

The previous prime is 21343373. The next prime is 21343429. The reversal of 21343386 is 68334312.

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, 26145 + ... + 26948.

It is an arithmetic number, because the mean of its divisors is an integer number (2707794).

Almost surely, 2^21343386 is an apocalyptic number.

21343386 is an abundant number, since it is smaller than the sum of its proper divisors (21981318).

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

21343386 is a wasteful number, since it uses less digits than its factorization.

21343386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53165.

The product of its digits is 10368, while the sum is 30.

The square root of 21343386 is about 4619.8902584369. The cubic root of 21343386 is about 277.3880662105.

Adding to 21343386 its reverse (68334312), we get a palindrome (89677698).

The spelling of 21343386 in words is "twenty-one million, three hundred forty-three thousand, three hundred eighty-six".