21676422 has 8 divisors (see below), whose sum is σ = 43352856. Its totient is φ = 7225472.

The previous prime is 21676387. The next prime is 21676469. The reversal of 21676422 is 22467612.

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

21676422 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21676422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806363 + ... + 1806374.

It is an arithmetic number, because the mean of its divisors is an integer number (5419107).

Almost surely, 2^21676422 is an apocalyptic number.

21676422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21676422 is a wasteful number, since it uses less digits than its factorization.

21676422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612742.

The product of its digits is 8064, while the sum is 30.

The square root of 21676422 is about 4655.7944542258. The cubic root of 21676422 is about 278.8233874085.

The spelling of 21676422 in words is "twenty-one million, six hundred seventy-six thousand, four hundred twenty-two".