42420640020 has 48 divisors (see below), whose sum is σ = 129575775168. Its totient is φ = 10283791360.

The previous prime is 42420639979. The next prime is 42420640021. The reversal of 42420640020 is 2004602424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420640021) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 32136189 + ... + 32137508.

It is an arithmetic number, because the mean of its divisors is an integer number (2699495316).

Almost surely, 2^42420640020 is an apocalyptic number.

It is an amenable number.

42420640020 is an abundant number, since it is smaller than the sum of its proper divisors (87155135148).

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

42420640020 is a wasteful number, since it uses less digits than its factorization.

42420640020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64273720 (or 64273718 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The spelling of 42420640020 in words is "forty-two billion, four hundred twenty million, six hundred forty thousand, twenty".