21359088 has 60 divisors (see below), whose sum is σ = 62384400. Its totient is φ = 6809088.

The previous prime is 21359083. The next prime is 21359113. The reversal of 21359088 is 88095312.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21359083) 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 11 ways as a sum of consecutive naturals, for example, 88 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (1039740).

Almost surely, 2^21359088 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 21359088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31192200).

21359088 is an abundant number, since it is smaller than the sum of its proper divisors (41025312).

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

21359088 is a wasteful number, since it uses less digits than its factorization.

21359088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6486 (or 6477 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 21359088 is about 4621.5893370138. The cubic root of 21359088 is about 277.4560729105.

The spelling of 21359088 in words is "twenty-one million, three hundred fifty-nine thousand, eighty-eight".