20430300 has 144 divisors (see below), whose sum is σ = 66495744. Its totient is φ = 4800000.

The previous prime is 20430251. The next prime is 20430307. The reversal of 20430300 is 303402.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135225 + ... + 135375.

It is an arithmetic number, because the mean of its divisors is an integer number (461776).

Almost surely, 2^20430300 is an apocalyptic number.

20430300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33247872).

20430300 is an abundant number, since it is smaller than the sum of its proper divisors (46065444).

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

20430300 is a wasteful number, since it uses less digits than its factorization.

20430300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 20430300 is about 4519.9889380396. The cubic root of 20430300 is about 273.3746549994.

Adding to 20430300 its reverse (303402), we get a palindrome (20733702).

The spelling of 20430300 in words is "twenty million, four hundred thirty thousand, three hundred".