203018210020 has 48 divisors (see below), whose sum is σ = 427447582128. Its totient is φ = 80996267520.

The previous prime is 203018209969. The next prime is 203018210023. The reversal of 203018210020 is 20012810302.

It can be written as a sum of positive squares in 8 ways, for example, as 28382814784 + 174635395236 = 168472^2 + 417894^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 203018210020.

It is not an unprimeable number, because it can be changed into a prime (203018210023) 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 15 ways as a sum of consecutive naturals, for example, 12421774 + ... + 12438106.

It is an arithmetic number, because the mean of its divisors is an integer number (8905157961).

Almost surely, 2^203018210020 is an apocalyptic number.

203018210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203018210020 is an abundant number, since it is smaller than the sum of its proper divisors (224429372108).

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

203018210020 is a wasteful number, since it uses less digits than its factorization.

203018210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17920 (or 17918 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The spelling of 203018210020 in words is "two hundred three billion, eighteen million, two hundred ten thousand, twenty".