42021431020 has 24 divisors (see below), whose sum is σ = 92081745504. Its totient is φ = 16077764736.

The previous prime is 42021430963. The next prime is 42021431033. The reversal of 42021431020 is 2013412024.

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 7 ways as a sum of consecutive naturals, for example, 45675009 + ... + 45675928.

It is an arithmetic number, because the mean of its divisors is an integer number (3836739396).

Almost surely, 2^42021431020 is an apocalyptic number.

It is an amenable number.

42021431020 is an abundant number, since it is smaller than the sum of its proper divisors (50060314484).

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

42021431020 is a wasteful number, since it uses less digits than its factorization.

42021431020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91350969 (or 91350967 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 42021431020 its reverse (2013412024), we get a palindrome (44034843044).

The spelling of 42021431020 in words is "forty-two billion, twenty-one million, four hundred thirty-one thousand, twenty".