203000020 has 48 divisors (see below), whose sum is σ = 438749136. Its totient is φ = 78848000.

The previous prime is 202999991. The next prime is 203000051. The reversal of 203000020 is 20000302.

203000020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 36796356 + 166203664 = 6066^2 + 12892^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202999967 and 203000012.

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 15 ways as a sum of consecutive naturals, for example, 229980 + ... + 230860.

It is an arithmetic number, because the mean of its divisors is an integer number (9140607).

Almost surely, 2^203000020 is an apocalyptic number.

203000020 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 203000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219374568).

203000020 is an abundant number, since it is smaller than the sum of its proper divisors (235749116).

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

203000020 is a wasteful number, since it uses less digits than its factorization.

203000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 203000020 is about 14247.8075506374. The cubic root of 203000020 is about 587.7130852220.

Adding to 203000020 its reverse (20000302), we get a palindrome (223000322).

The spelling of 203000020 in words is "two hundred three million, twenty", and thus it is an aban number.