203753312420 has 96 divisors (see below), whose sum is σ = 500299269120. Its totient is φ = 68250516480.

The previous prime is 203753312417. The next prime is 203753312449. The reversal of 203753312420 is 24213357302.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3716810 + ... + 3771230.

It is an arithmetic number, because the mean of its divisors is an integer number (5211450720).

Almost surely, 2^203753312420 is an apocalyptic number.

203753312420 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 203753312420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250149634560).

203753312420 is an abundant number, since it is smaller than the sum of its proper divisors (296545956700).

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

203753312420 is a wasteful number, since it uses less digits than its factorization.

203753312420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55053 (or 55051 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

Adding to 203753312420 its reverse (24213357302), we get a palindrome (227966669722).

The spelling of 203753312420 in words is "two hundred three billion, seven hundred fifty-three million, three hundred twelve thousand, four hundred twenty".