21343676 has 6 divisors (see below), whose sum is σ = 37351440. Its totient is φ = 10671836.

The previous prime is 21343661. The next prime is 21343691. The reversal of 21343676 is 67634312.

It is an interprime number because it is at equal distance from previous prime (21343661) and next prime (21343691).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2667956 + ... + 2667963.

It is an arithmetic number, because the mean of its divisors is an integer number (6225240).

Almost surely, 2^21343676 is an apocalyptic number.

It is an amenable number.

21343676 is a deficient number, since it is larger than the sum of its proper divisors (16007764).

21343676 is a wasteful number, since it uses less digits than its factorization.

21343676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335923 (or 5335921 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 21343676 is about 4619.9216443572. The cubic root of 21343676 is about 277.3893225275.

Adding to 21343676 its reverse (67634312), we get a palindrome (88977988).

The spelling of 21343676 in words is "twenty-one million, three hundred forty-three thousand, six hundred seventy-six".