20030930 has 64 divisors (see below), whose sum is σ = 41057280. Its totient is φ = 6994944.

The previous prime is 20030893. The next prime is 20030939. The reversal of 20030930 is 3903002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 20030899 and 20030908.

It is not an unprimeable number, because it can be changed into a prime (20030939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183716 + ... + 183824.

It is an arithmetic number, because the mean of its divisors is an integer number (641520).

Almost surely, 2^20030930 is an apocalyptic number.

20030930 is an abundant number, since it is smaller than the sum of its proper divisors (21026350).

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

20030930 is a wasteful number, since it uses less digits than its factorization.

20030930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 20030930 is about 4475.5926981798. The cubic root of 20030930 is about 271.5816178165.

Adding to 20030930 its reverse (3903002), we get a palindrome (23933932).

The spelling of 20030930 in words is "twenty million, thirty thousand, nine hundred thirty".