21884371 has 8 divisors (see below), whose sum is σ = 23242320. Its totient is φ = 20547072.

The previous prime is 21884351. The next prime is 21884383. The reversal of 21884371 is 17348812.

It is a happy number.

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 21884371 - 2¹⁹ = 21360083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21884311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2950 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (2905290).

Almost surely, 2^21884371 is an apocalyptic number.

21884371 is a deficient number, since it is larger than the sum of its proper divisors (1357949).

21884371 is a wasteful number, since it uses less digits than its factorization.

21884371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10325.

The product of its digits is 10752, while the sum is 34.

The square root of 21884371 is about 4678.0734282394. The cubic root of 21884371 is about 279.7121659488.

The spelling of 21884371 in words is "twenty-one million, eight hundred eighty-four thousand, three hundred seventy-one".