21884001 has 8 divisors (see below), whose sum is σ = 29249664. Its totient is φ = 14553840.

The previous prime is 21883997. The next prime is 21884011. The reversal of 21884001 is 10048812.

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

It is not a de Polignac number, because 21884001 - 2² = 21883997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21884011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7401 + ... + 9926.

It is an arithmetic number, because the mean of its divisors is an integer number (3656208).

Almost surely, 2^21884001 is an apocalyptic number.

It is an amenable number.

21884001 is a deficient number, since it is larger than the sum of its proper divisors (7365663).

21884001 is a wasteful number, since it uses less digits than its factorization.

21884001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17751.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 21884001 is about 4678.0338818782. The cubic root of 21884001 is about 279.7105895714.

The spelling of 21884001 in words is "twenty-one million, eight hundred eighty-four thousand, one".