21335088 has 80 divisors (see below), whose sum is σ = 58183776. Its totient is φ = 6727680.

The previous prime is 21335071. The next prime is 21335101. The reversal of 21335088 is 88053312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72670 + ... + 72962.

Almost surely, 2^21335088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21335088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29091888).

21335088 is an abundant number, since it is smaller than the sum of its proper divisors (36848688).

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

21335088 is a wasteful number, since it uses less digits than its factorization.

21335088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 21335088 is about 4618.9920978499. The cubic root of 21335088 is about 277.3521133938.

The spelling of 21335088 in words is "twenty-one million, three hundred thirty-five thousand, eighty-eight".