20130030 has 24 divisors (see below), whose sum is σ = 52338312. Its totient is φ = 5367984.

The previous prime is 20130029. The next prime is 20130043. The reversal of 20130030 is 3003102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20129994 and 20130021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111744 + ... + 111923.

It is an arithmetic number, because the mean of its divisors is an integer number (2180763).

Almost surely, 2^20130030 is an apocalyptic number.

20130030 is an abundant number, since it is smaller than the sum of its proper divisors (32208282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20130030 is a wasteful number, since it uses less digits than its factorization.

20130030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223680 (or 223677 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 20130030 is about 4486.6501980877. The cubic root of 20130030 is about 272.0287509257.

Adding to 20130030 its reverse (3003102), we get a palindrome (23133132).

The spelling of 20130030 in words is "twenty million, one hundred thirty thousand, thirty".