21884327 has 4 divisors (see below), whose sum is σ = 22011000. Its totient is φ = 21757656.

The previous prime is 21884323. The next prime is 21884329. The reversal of 21884327 is 72348812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21884327 - 2² = 21884323 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21884323) 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, 63077 + ... + 63422.

It is an arithmetic number, because the mean of its divisors is an integer number (5502750).

Almost surely, 2^21884327 is an apocalyptic number.

21884327 is a deficient number, since it is larger than the sum of its proper divisors (126673).

21884327 is a wasteful number, since it uses less digits than its factorization.

21884327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126672.

The product of its digits is 21504, while the sum is 35.

The square root of 21884327 is about 4678.0687254464. The cubic root of 21884327 is about 279.7119784886.

The spelling of 21884327 in words is "twenty-one million, eight hundred eighty-four thousand, three hundred twenty-seven".