42004434112520 has 128 divisors (see below), whose sum is σ = 103748088729600. Its totient is φ = 15178643193600.

The previous prime is 42004434112457. The next prime is 42004434112643. The reversal of 42004434112520 is 2521143440024.

42004434112520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42004434112520² (a number of 28 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 269667221 + ... + 269822939.

It is an arithmetic number, because the mean of its divisors is an integer number (810531943200).

Almost surely, 2^{42004434112520} is an apocalyptic number.

42004434112520 is a gapful number since it is divisible by the number (40) 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 42004434112520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51874044364800).

42004434112520 is an abundant number, since it is smaller than the sum of its proper divisors (61743654617080).

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

42004434112520 is a wasteful number, since it uses less digits than its factorization.

42004434112520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159579 (or 159575 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 42004434112520 its reverse (2521143440024), we get a palindrome (44525577552544).

The spelling of 42004434112520 in words is "forty-two trillion, four billion, four hundred thirty-four million, one hundred twelve thousand, five hundred twenty".