20043240212420 has 24 divisors (see below), whose sum is σ = 42100325284248. Its totient is φ = 8015482592000.

The previous prime is 20043240212399. The next prime is 20043240212449. The reversal of 20043240212420 is 2421204234002.

It can be written as a sum of positive squares in 4 ways, for example, as 3455524081216 + 16587716131204 = 1858904^2 + 4072802^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20043240212420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113252681 + ... + 113429520.

It is an arithmetic number, because the mean of its divisors is an integer number (1754180220177).

Almost surely, 2^{20043240212420} is an apocalyptic number.

20043240212420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20043240212420 is an abundant number, since it is smaller than the sum of its proper divisors (22057085071828).

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

20043240212420 is a wasteful number, since it uses less digits than its factorization.

20043240212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226686631 (or 226686629 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20043240212420 its reverse (2421204234002), we get a palindrome (22464444446422).

The spelling of 20043240212420 in words is "twenty trillion, forty-three billion, two hundred forty million, two hundred twelve thousand, four hundred twenty".