20323030 has 64 divisors (see below), whose sum is σ = 47029248. Its totient is φ = 6145920.

The previous prime is 20323021. The next prime is 20323031. The reversal of 20323030 is 3032302.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 20323030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323031) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 20445 + ... + 21415.

It is an arithmetic number, because the mean of its divisors is an integer number (734832).

Almost surely, 2^20323030 is an apocalyptic number.

20323030 is an abundant number, since it is smaller than the sum of its proper divisors (26706218).

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

20323030 is a wasteful number, since it uses less digits than its factorization.

20323030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021.

The product of its (nonzero) digits is 108, while the sum is 13.

The square root of 20323030 is about 4508.1071415839. The cubic root of 20323030 is about 272.8953607930.

Adding to 20323030 its reverse (3032302), we get a palindrome (23355332).

The spelling of 20323030 in words is "twenty million, three hundred twenty-three thousand, thirty".