21036352 has 56 divisors (see below), whose sum is σ = 45061632. Its totient is φ = 9715200.

The previous prime is 21036347. The next prime is 21036371. The reversal of 21036352 is 25363012.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45402 + ... + 45862.

It is an arithmetic number, because the mean of its divisors is an integer number (804672).

Almost surely, 2^21036352 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 21036352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22530816).

21036352 is an abundant number, since it is smaller than the sum of its proper divisors (24025280).

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

21036352 is a wasteful number, since it uses less digits than its factorization.

21036352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 21036352 is about 4586.5403083370. The cubic root of 21036352 is about 276.0515201729.

Adding to 21036352 its reverse (25363012), we get a palindrome (46399364).

The spelling of 21036352 in words is "twenty-one million, thirty-six thousand, three hundred fifty-two".