42129018420 has 48 divisors (see below), whose sum is σ = 120186944640. Its totient is φ = 11022434176.

The previous prime is 42129018389. The next prime is 42129018427. The reversal of 42129018420 is 2481092124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42129018427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6620880 + ... + 6627239.

It is an arithmetic number, because the mean of its divisors is an integer number (2503894680).

Almost surely, 2^42129018420 is an apocalyptic number.

It is an amenable number.

42129018420 is an abundant number, since it is smaller than the sum of its proper divisors (78057926220).

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

42129018420 is a wasteful number, since it uses less digits than its factorization.

42129018420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13248184 (or 13248182 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 42129018420 in words is "forty-two billion, one hundred twenty-nine million, eighteen thousand, four hundred twenty".