20203113220 has 12 divisors (see below), whose sum is σ = 42426537804. Its totient is φ = 8081245280.

The previous prime is 20203113179. The next prime is 20203113257. The reversal of 20203113220 is 2231130202.

It can be written as a sum of positive squares in 2 ways, for example, as 3529072836 + 16674040384 = 59406^2 + 129128^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20203113194 and 20203113203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505077811 + ... + 505077850.

It is an arithmetic number, because the mean of its divisors is an integer number (3535544817).

Almost surely, 2^20203113220 is an apocalyptic number.

20203113220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20203113220 is an abundant number, since it is smaller than the sum of its proper divisors (22223424584).

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

20203113220 is a wasteful number, since it uses less digits than its factorization.

20203113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010155670 (or 1010155668 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20203113220 its reverse (2231130202), we get a palindrome (22434243422).

The spelling of 20203113220 in words is "twenty billion, two hundred three million, one hundred thirteen thousand, two hundred twenty".