21334884 has 12 divisors (see below), whose sum is σ = 49781424. Its totient is φ = 7111624.

The previous prime is 21334867. The next prime is 21334889. The reversal of 21334884 is 48843312.

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

It is not an unprimeable number, because it can be changed into a prime (21334889) 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 3 ways as a sum of consecutive naturals, for example, 888942 + ... + 888965.

It is an arithmetic number, because the mean of its divisors is an integer number (4148452).

Almost surely, 2^21334884 is an apocalyptic number.

It is an amenable number.

21334884 is an abundant number, since it is smaller than the sum of its proper divisors (28446540).

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

21334884 is a wasteful number, since it uses less digits than its factorization.

21334884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777914 (or 1777912 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 21334884 is about 4618.9700150575. The cubic root of 21334884 is about 277.3512294038.

The spelling of 21334884 in words is "twenty-one million, three hundred thirty-four thousand, eight hundred eighty-four".