21344682 has 16 divisors (see below), whose sum is σ = 43731072. Its totient is φ = 6941280.

The previous prime is 21344677. The next prime is 21344699. The reversal of 21344682 is 28644312.

It is a super-2 number, since 2×21344682² = 911190899362248, which contains 22 as substring.

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, 43138 + ... + 43629.

It is an arithmetic number, because the mean of its divisors is an integer number (2733192).

Almost surely, 2^21344682 is an apocalyptic number.

21344682 is an abundant number, since it is smaller than the sum of its proper divisors (22386390).

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

21344682 is a wasteful number, since it uses less digits than its factorization.

21344682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86813.

The product of its digits is 9216, while the sum is 30.

The square root of 21344682 is about 4620.0305193797. The cubic root of 21344682 is about 277.3936805596.

Adding to 21344682 its reverse (28644312), we get a palindrome (49988994).

The spelling of 21344682 in words is "twenty-one million, three hundred forty-four thousand, six hundred eighty-two".