203131344420 has 72 divisors (see below), whose sum is σ = 619607439360. Its totient is φ = 53865733440.

The previous prime is 203131344407. The next prime is 203131344431. The reversal of 203131344420 is 24443131302.

203131344420 is a `hidden beast` number, since 2 + 0 + 313 + 1 + 344 + 4 + 2 + 0 = 666.

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, 3120036 + ... + 3184475.

It is an arithmetic number, because the mean of its divisors is an integer number (8605658880).

Almost surely, 2^203131344420 is an apocalyptic number.

203131344420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203131344420 is an abundant number, since it is smaller than the sum of its proper divisors (416476094940).

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

203131344420 is a wasteful number, since it uses less digits than its factorization.

203131344420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6304705 (or 6304700 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 203131344420 its reverse (24443131302), we get a palindrome (227574475722).

The spelling of 203131344420 in words is "two hundred three billion, one hundred thirty-one million, three hundred forty-four thousand, four hundred twenty".