21676332 has 12 divisors (see below), whose sum is σ = 50578136. Its totient is φ = 7225440.

The previous prime is 21676313. The next prime is 21676337. The reversal of 21676332 is 23367612.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21676332.

It is not an unprimeable number, because it can be changed into a prime (21676337) 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, 903169 + ... + 903192.

Almost surely, 2^21676332 is an apocalyptic number.

It is an amenable number.

21676332 is an abundant number, since it is smaller than the sum of its proper divisors (28901804).

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

21676332 is a wasteful number, since it uses less digits than its factorization.

21676332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806368 (or 1806366 counting only the distinct ones).

The product of its digits is 9072, while the sum is 30.

The square root of 21676332 is about 4655.7847888407. The cubic root of 21676332 is about 278.8230015186.

The spelling of 21676332 in words is "twenty-one million, six hundred seventy-six thousand, three hundred thirty-two".