203311020303220 has 12 divisors (see below), whose sum is σ = 426953142636804. Its totient is φ = 81324408121280.

The previous prime is 203311020303173. The next prime is 203311020303227. The reversal of 203311020303220 is 22303020113302.

It can be written as a sum of positive squares in 2 ways, for example, as 113995894656996 + 89315125646224 = 10676886^2 + 9450668^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203311020303191 and 203311020303200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203311020303227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5082775507561 + ... + 5082775507600.

It is an arithmetic number, because the mean of its divisors is an integer number (35579428553067).

Almost surely, 2^{203311020303220} is an apocalyptic number.

203311020303220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203311020303220 is an abundant number, since it is smaller than the sum of its proper divisors (223642122333584).

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

203311020303220 is a wasteful number, since it uses less digits than its factorization.

203311020303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10165551015170 (or 10165551015168 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 203311020303220 its reverse (22303020113302), we get a palindrome (225614040416522).

The spelling of 203311020303220 in words is "two hundred three trillion, three hundred eleven billion, twenty million, three hundred three thousand, two hundred twenty".