20042434103220 has 72 divisors (see below), whose sum is σ = 60825736704096. Its totient is φ = 5341980676032.

The previous prime is 20042434103203. The next prime is 20042434103231. The reversal of 20042434103220 is 2230143424002.

20042434103220 is a `hidden beast` number, since 2 + 0 + 0 + 4 + 2 + 434 + 1 + 0 + 3 + 220 = 666.

It is a super-2 number, since 2×20042434103220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27434482 + ... + 28155561.

It is an arithmetic number, because the mean of its divisors is an integer number (844801898668).

Almost surely, 2^{20042434103220} is an apocalyptic number.

20042434103220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20042434103220 is an abundant number, since it is smaller than the sum of its proper divisors (40783302600876).

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

20042434103220 is a wasteful number, since it uses less digits than its factorization.

20042434103220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55592061 (or 55592056 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20042434103220 its reverse (2230143424002), we get a palindrome (22272577527222).

The spelling of 20042434103220 in words is "twenty trillion, forty-two billion, four hundred thirty-four million, one hundred three thousand, two hundred twenty".