21676633 has 8 divisors (see below), whose sum is σ = 23819040. Its totient is φ = 19562880.

The previous prime is 21676631. The next prime is 21676637. The reversal of 21676633 is 33667612.

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

It is a cyclic number.

It is not a de Polignac number, because 21676633 - 2¹ = 21676631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21676631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5560 + ... + 8617.

It is an arithmetic number, because the mean of its divisors is an integer number (2977380).

Almost surely, 2^21676633 is an apocalyptic number.

It is an amenable number.

21676633 is a deficient number, since it is larger than the sum of its proper divisors (2142407).

21676633 is a wasteful number, since it uses less digits than its factorization.

21676633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14327.

The product of its digits is 27216, while the sum is 34.

The square root of 21676633 is about 4655.8171141058. The cubic root of 21676633 is about 278.8242921019.

The spelling of 21676633 in words is "twenty-one million, six hundred seventy-six thousand, six hundred thirty-three".