21433532 has 12 divisors (see below), whose sum is σ = 39715200. Its totient is φ = 10086336.

The previous prime is 21433519. The next prime is 21433541. The reversal of 21433532 is 23533412.

It is a junction number, because it is equal to n+sod(n) for n = 21433498 and 21433507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157532 + ... + 157667.

It is an arithmetic number, because the mean of its divisors is an integer number (3309600).

Almost surely, 2^21433532 is an apocalyptic number.

It is an amenable number.

21433532 is a deficient number, since it is larger than the sum of its proper divisors (18281668).

21433532 is a wasteful number, since it uses less digits than its factorization.

21433532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315220 (or 315218 counting only the distinct ones).

The product of its digits is 2160, while the sum is 23.

The square root of 21433532 is about 4629.6362708101. The cubic root of 21433532 is about 277.7780434249.

Adding to 21433532 its reverse (23533412), we get a palindrome (44966944).

The spelling of 21433532 in words is "twenty-one million, four hundred thirty-three thousand, five hundred thirty-two".