203242442440 has 64 divisors (see below), whose sum is σ = 468126864000. Its totient is φ = 79389657600.

The previous prime is 203242442423. The next prime is 203242442441. The reversal of 203242442440 is 44244242302.

It is not an unprimeable number, because it can be changed into a prime (203242442441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71196 + ... + 641524.

It is an arithmetic number, because the mean of its divisors is an integer number (7314482250).

Almost surely, 2^203242442440 is an apocalyptic number.

203242442440 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 203242442440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234063432000).

203242442440 is an abundant number, since it is smaller than the sum of its proper divisors (264884421560).

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

203242442440 is a wasteful number, since it uses less digits than its factorization.

203242442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570550 (or 570546 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 31.

Adding to 203242442440 its reverse (44244242302), we get a palindrome (247486684742).

The spelling of 203242442440 in words is "two hundred three billion, two hundred forty-two million, four hundred forty-two thousand, four hundred forty".