243105405020 has 12 divisors (see below), whose sum is σ = 510521350584. Its totient is φ = 97242162000.

The previous prime is 243105405001. The next prime is 243105405091. The reversal of 243105405020 is 20504501342.

It is a happy number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 6077635106 + ... + 6077635145.

It is an arithmetic number, because the mean of its divisors is an integer number (42543445882).

Almost surely, 2^243105405020 is an apocalyptic number.

243105405020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243105405020 is an abundant number, since it is smaller than the sum of its proper divisors (267415945564).

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

243105405020 is a wasteful number, since it uses less digits than its factorization.

243105405020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12155270260 (or 12155270258 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 243105405020 its reverse (20504501342), we get a palindrome (263609906362).

The spelling of 243105405020 in words is "two hundred forty-three billion, one hundred five million, four hundred five thousand, twenty".