20632 has 8 divisors (see below), whose sum is σ = 38700. Its totient is φ = 10312.

The previous prime is 20627. The next prime is 20639. The reversal of 20632 is 23602.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 11.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282 + ... + 1297.

2²⁰⁶³² is an apocalyptic number.

It is an amenable number.

20632 is a deficient number, since it is larger than the sum of its proper divisors (18068).

20632 is a wasteful number, since it uses less digits than its factorization.

20632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585 (or 2581 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20632 is about 143.6384349678. The cubic root of 20632 is about 27.4271349281.

The spelling of 20632 in words is "twenty thousand, six hundred thirty-two".