21466088 has 64 divisors (see below), whose sum is σ = 47952000. Its totient is φ = 8819712.

The previous prime is 21466079. The next prime is 21466091. The reversal of 21466088 is 88066412.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 241148 + ... + 241236.

It is an arithmetic number, because the mean of its divisors is an integer number (749250).

Almost surely, 2^21466088 is an apocalyptic number.

21466088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21466088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23976000).

21466088 is an abundant number, since it is smaller than the sum of its proper divisors (26485912).

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

21466088 is a wasteful number, since it uses less digits than its factorization.

21466088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 21466088 is about 4633.1509796250. The cubic root of 21466088 is about 277.9186139278.

The spelling of 21466088 in words is "twenty-one million, four hundred sixty-six thousand, eighty-eight".