243042120420 has 96 divisors (see below), whose sum is σ = 743521403520. Its totient is φ = 58828968960.

The previous prime is 243042120413. The next prime is 243042120421. The reversal of 243042120420 is 24021240342.

It is not an unprimeable number, because it can be changed into a prime (243042120421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149016 + ... + 712944.

It is an arithmetic number, because the mean of its divisors is an integer number (7745014620).

Almost surely, 2^243042120420 is an apocalyptic number.

243042120420 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 243042120420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371760701760).

243042120420 is an abundant number, since it is smaller than the sum of its proper divisors (500479283100).

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

243042120420 is a wasteful number, since it uses less digits than its factorization.

243042120420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564605 (or 564603 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 243042120420 its reverse (24021240342), we get a palindrome (267063360762).

The spelling of 243042120420 in words is "two hundred forty-three billion, forty-two million, one hundred twenty thousand, four hundred twenty".