20203100 has 18 divisors (see below), whose sum is σ = 43840944. Its totient is φ = 8081200.

The previous prime is 20203093. The next prime is 20203129. The reversal of 20203100 is 130202.

It is a super-2 number, since 2×20203100² = 816330499220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100916 + ... + 101115.

It is an arithmetic number, because the mean of its divisors is an integer number (2435608).

Almost surely, 2^20203100 is an apocalyptic number.

20203100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20203100 is an abundant number, since it is smaller than the sum of its proper divisors (23637844).

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

20203100 is a wasteful number, since it uses less digits than its factorization.

20203100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202045 (or 202038 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 20203100 is about 4494.7858680920. The cubic root of 20203100 is about 272.3574992110.

Adding to 20203100 its reverse (130202), we get a palindrome (20333302).

The spelling of 20203100 in words is "twenty million, two hundred three thousand, one hundred".