21086352 has 160 divisors (see below), whose sum is σ = 73011200. Its totient is φ = 5692032.

The previous prime is 21086347. The next prime is 21086381. The reversal of 21086352 is 25368012.

21086352 is a `hidden beast` number, since 21 + 0 + 8 + 635 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57273 + ... + 57639.

It is an arithmetic number, because the mean of its divisors is an integer number (456320).

Almost surely, 2^21086352 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 21086352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36505600).

21086352 is an abundant number, since it is smaller than the sum of its proper divisors (51924848).

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

21086352 is a wasteful number, since it uses less digits than its factorization.

21086352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 21086352 is about 4591.9878048619. The cubic root of 21086352 is about 276.2700570328.

The spelling of 21086352 in words is "twenty-one million, eighty-six thousand, three hundred fifty-two".