21032384 has 28 divisors (see below), whose sum is σ = 43086528. Its totient is φ = 10176000.

The previous prime is 21032371. The next prime is 21032387. The reversal of 21032384 is 48323012.

It is a super-2 number, since 2×21032384² = 884722353446912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3317 + ... + 7284.

Almost surely, 2^21032384 is an apocalyptic number.

It is an amenable number.

21032384 is an abundant number, since it is smaller than the sum of its proper divisors (22054144).

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

21032384 is a wasteful number, since it uses less digits than its factorization.

21032384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10644 (or 10634 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 21032384 is about 4586.1077178802. The cubic root of 21032384 is about 276.0341622630.

Adding to 21032384 its reverse (48323012), we get a palindrome (69355396).

The spelling of 21032384 in words is "twenty-one million, thirty-two thousand, three hundred eighty-four".