42031421420 has 72 divisors (see below), whose sum is σ = 91059006192. Its totient is φ = 16295984640.

The previous prime is 42031421381. The next prime is 42031421437. The reversal of 42031421420 is 2412413024.

42031421420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5274359 + ... + 5282321.

Almost surely, 2^42031421420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42031421420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45529503096).

42031421420 is an abundant number, since it is smaller than the sum of its proper divisors (49027584772).

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

42031421420 is a wasteful number, since it uses less digits than its factorization.

42031421420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8211 (or 8168 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42031421420 its reverse (2412413024), we get a palindrome (44443834444).

The spelling of 42031421420 in words is "forty-two billion, thirty-one million, four hundred twenty-one thousand, four hundred twenty".