203311112200020 has 216 divisors, whose sum is σ = 677964257890920. Its totient is φ = 49280814950400.

The previous prime is 203311112199929. The next prime is 203311112200061. The reversal of 203311112200020 is 20002211113302.

203311112200020 is a `hidden beast` number, since 2 + 0 + 331 + 1 + 112 + 200 + 0 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 28614304386756 + 174696807813264 = 5349234^2 + 13217292^2 .

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 = 203311112199966 and 203311112200002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 159863440 + ... + 161130200.

Almost surely, 2^{203311112200020} is an apocalyptic number.

203311112200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203311112200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338982128945460).

203311112200020 is an abundant number, since it is smaller than the sum of its proper divisors (474653145690900).

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

203311112200020 is a wasteful number, since it uses less digits than its factorization.

203311112200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274167 (or 1274151 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 203311112200020 its reverse (20002211113302), we get a palindrome (223313323313322).

The spelling of 203311112200020 in words is "two hundred three trillion, three hundred eleven billion, one hundred twelve million, two hundred thousand, twenty".