21676846 has 8 divisors (see below), whose sum is σ = 32591664. Its totient is φ = 10812960.

The previous prime is 21676829. The next prime is 21676847. The reversal of 21676846 is 64867612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21676799 and 21676808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21676847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11650 + ... + 13381.

It is an arithmetic number, because the mean of its divisors is an integer number (4073958).

Almost surely, 2^21676846 is an apocalyptic number.

21676846 is a deficient number, since it is larger than the sum of its proper divisors (10914818).

21676846 is a wasteful number, since it uses less digits than its factorization.

21676846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25466.

The product of its digits is 96768, while the sum is 40.

The square root of 21676846 is about 4655.8399886594. The cubic root of 21676846 is about 278.8252053645.

It can be divided in two parts, 21676 and 846, that added together give a palindrome (22522).

The spelling of 21676846 in words is "twenty-one million, six hundred seventy-six thousand, eight hundred forty-six".