20203133220 has 36 divisors (see below), whose sum is σ = 61282837980. Its totient is φ = 5387502144.

The previous prime is 20203133207. The next prime is 20203133261. The reversal of 20203133220 is 2233130202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8599965696 + 11603167524 = 92736^2 + 107718^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20203133193 and 20203133202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56119635 + ... + 56119994.

It is an arithmetic number, because the mean of its divisors is an integer number (1702301055).

Almost surely, 2^20203133220 is an apocalyptic number.

20203133220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20203133220 is an abundant number, since it is smaller than the sum of its proper divisors (41079704760).

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

20203133220 is a wasteful number, since it uses less digits than its factorization.

20203133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112239644 (or 112239639 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20203133220 its reverse (2233130202), we get a palindrome (22436263422).

The spelling of 20203133220 in words is "twenty billion, two hundred three million, one hundred thirty-three thousand, two hundred twenty".