203031013332 has 72 divisors (see below), whose sum is σ = 552167673120. Its totient is φ = 57894809280.

The previous prime is 203031013291. The next prime is 203031013343. The reversal of 203031013332 is 233310130302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 203031013299 and 203031013308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39894 + ... + 638477.

It is an arithmetic number, because the mean of its divisors is an integer number (7668995460).

Almost surely, 2^203031013332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203031013332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276083836560).

203031013332 is an abundant number, since it is smaller than the sum of its proper divisors (349136659788).

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

203031013332 is a wasteful number, since it uses less digits than its factorization.

203031013332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678901 (or 678892 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 203031013332 its reverse (233310130302), we get a palindrome (436341143634).

The spelling of 203031013332 in words is "two hundred three billion, thirty-one million, thirteen thousand, three hundred thirty-two".