20305030 has 16 divisors (see below), whose sum is σ = 37399824. Its totient is φ = 7932960.

The previous prime is 20305013. The next prime is 20305039. The reversal of 20305030 is 3050302.

It is a self number, because there is not a number n which added to its sum of digits gives 20305030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23181 + ... + 24040.

It is an arithmetic number, because the mean of its divisors is an integer number (2337489).

Almost surely, 2^20305030 is an apocalyptic number.

20305030 is a deficient number, since it is larger than the sum of its proper divisors (17094794).

20305030 is a wasteful number, since it uses less digits than its factorization.

20305030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47271.

The product of its (nonzero) digits is 90, while the sum is 13.

The square root of 20305030 is about 4506.1102960314. The cubic root of 20305030 is about 272.8147696702.

Adding to 20305030 its reverse (3050302), we get a palindrome (23355332).

The spelling of 20305030 in words is "twenty million, three hundred five thousand, thirty".