21132632 has 16 divisors (see below), whose sum is σ = 41954760. Its totient is φ = 9944704.

The previous prime is 21132623. The next prime is 21132659. The reversal of 21132632 is 23623112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77558 + ... + 77829.

Almost surely, 2^21132632 is an apocalyptic number.

It is an amenable number.

21132632 is a deficient number, since it is larger than the sum of its proper divisors (20822128).

21132632 is a wasteful number, since it uses less digits than its factorization.

21132632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155410 (or 155406 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 21132632 is about 4597.0242548849. The cubic root of 21132632 is about 276.4720270973.

Adding to 21132632 its reverse (23623112), we get a palindrome (44755744).

The spelling of 21132632 in words is "twenty-one million, one hundred thirty-two thousand, six hundred thirty-two".