203311132020 has 288 divisors, whose sum is σ = 640864224000. Its totient is φ = 52131796992.

The previous prime is 203311132009. The next prime is 203311132091. The reversal of 203311132020 is 20231113302.

203311132020 is a `hidden beast` number, since 2 + 0 + 331 + 11 + 320 + 2 + 0 = 666.

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 = 203311131984 and 203311132002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 237235432 + ... + 237236288.

It is an arithmetic number, because the mean of its divisors is an integer number (2225223000).

Almost surely, 2^203311132020 is an apocalyptic number.

203311132020 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 203311132020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320432112000).

203311132020 is an abundant number, since it is smaller than the sum of its proper divisors (437553091980).

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

203311132020 is a wasteful number, since it uses less digits than its factorization.

203311132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 203311132020 its reverse (20231113302), we get a palindrome (223542245322).

The spelling of 203311132020 in words is "two hundred three billion, three hundred eleven million, one hundred thirty-two thousand, twenty".