21024532 has 12 divisors (see below), whose sum is σ = 37416960. Its totient is φ = 10333976.

The previous prime is 21024499. The next prime is 21024539. The reversal of 21024532 is 23542012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024539) 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, 44308 + ... + 44779.

It is an arithmetic number, because the mean of its divisors is an integer number (3118080).

Almost surely, 2^21024532 is an apocalyptic number.

It is an amenable number.

21024532 is a deficient number, since it is larger than the sum of its proper divisors (16392428).

21024532 is a wasteful number, since it uses less digits than its factorization.

21024532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89150 (or 89148 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21024532 is about 4585.2515743414. The cubic root of 21024532 is about 275.9998074633. Note that the first 3 decimals are identical.

Adding to 21024532 its reverse (23542012), we get a palindrome (44566544).

It can be divided in two parts, 210 and 24532, that added together give a palindrome (24742).

The spelling of 21024532 in words is "twenty-one million, twenty-four thousand, five hundred thirty-two".