243404102020 has 12 divisors (see below), whose sum is σ = 511148614284. Its totient is φ = 97361640800.

The previous prime is 243404102017. The next prime is 243404102021. The reversal of 243404102020 is 20201404342.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 122343250176 + 121060851844 = 349776^2 + 347938^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243404101982 and 243404102000.

It is not an unprimeable number, because it can be changed into a prime (243404102021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6085102531 + ... + 6085102570.

It is an arithmetic number, because the mean of its divisors is an integer number (42595717857).

Almost surely, 2^243404102020 is an apocalyptic number.

243404102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243404102020 is an abundant number, since it is smaller than the sum of its proper divisors (267744512264).

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

243404102020 is a wasteful number, since it uses less digits than its factorization.

243404102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12170205110 (or 12170205108 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 243404102020 its reverse (20201404342), we get a palindrome (263605506362).

The spelling of 243404102020 in words is "two hundred forty-three billion, four hundred four million, one hundred two thousand, twenty".