20303100 has 108 divisors (see below), whose sum is σ = 67433184. Its totient is φ = 5091840.

The previous prime is 20303071. The next prime is 20303111. The reversal of 20303100 is 130302.

It is a happy number.

It is a super-2 number, since 2×20303100² = 824431739220000, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14637 + ... + 15963.

Almost surely, 2^20303100 is an apocalyptic number.

20303100 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 20303100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33716592).

20303100 is an abundant number, since it is smaller than the sum of its proper divisors (47130084).

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

20303100 is a wasteful number, since it uses less digits than its factorization.

20303100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364 (or 1354 counting only the distinct ones).

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

The square root of 20303100 is about 4505.8961372850. The cubic root of 20303100 is about 272.8061256841.

Adding to 20303100 its reverse (130302), we get a palindrome (20433402).

The spelling of 20303100 in words is "twenty million, three hundred three thousand, one hundred".