203120020 has 12 divisors (see below), whose sum is σ = 426552084. Its totient is φ = 81248000.

The previous prime is 203120011. The next prime is 203120033. The reversal of 203120020 is 20021302.

203120020 is digitally balanced in base 2, 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 2 ways, for example, as 66650896 + 136469124 = 8164^2 + 11682^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 203119979 and 203120006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5077981 + ... + 5078020.

It is an arithmetic number, because the mean of its divisors is an integer number (35546007).

Almost surely, 2^203120020 is an apocalyptic number.

203120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203120020 is an abundant number, since it is smaller than the sum of its proper divisors (223432064).

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

203120020 is a wasteful number, since it uses less digits than its factorization.

203120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156010 (or 10156008 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 203120020 is about 14252.0181027109. The cubic root of 203120020 is about 587.8288679333.

Adding to 203120020 its reverse (20021302), we get a palindrome (223141322).

The spelling of 203120020 in words is "two hundred three million, one hundred twenty thousand, twenty".