21283132 has 12 divisors (see below), whose sum is σ = 40110616. Its totient is φ = 9822960.

The previous prime is 21283127. The next prime is 21283139. The reversal of 21283132 is 23138212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21283139) 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, 204594 + ... + 204697.

Almost surely, 2^21283132 is an apocalyptic number.

It is an amenable number.

21283132 is a deficient number, since it is larger than the sum of its proper divisors (18827484).

21283132 is a wasteful number, since it uses less digits than its factorization.

21283132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409308 (or 409306 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 21283132 is about 4613.3644989313. The cubic root of 21283132 is about 277.1267909953.

The spelling of 21283132 in words is "twenty-one million, two hundred eighty-three thousand, one hundred thirty-two".