20630 has 8 divisors (see below), whose sum is σ = 37152. Its totient is φ = 8248.

The previous prime is 20627. The next prime is 20639. The reversal of 20630 is 3602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 11.

It is a nialpdrome in base 12.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022 + ... + 1041.

It is an arithmetic number, because the mean of its divisors is an integer number (4644).

2²⁰⁶³⁰ is an apocalyptic number.

20630 is a deficient number, since it is larger than the sum of its proper divisors (16522).

20630 is a wasteful number, since it uses less digits than its factorization.

20630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20630 is about 143.6314728742. The cubic root of 20630 is about 27.4262486666.

The spelling of 20630 in words is "twenty thousand, six hundred thirty".