20030 has 8 divisors (see below), whose sum is σ = 36072. Its totient is φ = 8008.

The previous prime is 20029. The next prime is 20047. The reversal of 20030 is 3002.

20030 = T₄₄ + T₄₅ + ... + T₅₈.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (5).

20030 is a modest number, since divided by 30 gives 20 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 19996 and 20023.

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, 992 + ... + 1011.

It is an arithmetic number, because the mean of its divisors is an integer number (4509).

2²⁰⁰³⁰ is an apocalyptic number.

20030 is a deficient number, since it is larger than the sum of its proper divisors (16042).

20030 is a wasteful number, since it uses less digits than its factorization.

20030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010.

The product of its (nonzero) digits is 6, while the sum is 5.

The square root of 20030 is about 141.5273825095. The cubic root of 20030 is about 27.1577414736.

Adding to 20030 its reverse (3002), we get a palindrome (23032).

The spelling of 20030 in words is "twenty thousand, thirty".