42420405204 has 18 divisors (see below), whose sum is σ = 107229357690. Its totient is φ = 14140135056.

The previous prime is 42420405199. The next prime is 42420405277. The reversal of 42420405204 is 40250402424.

It can be written as a sum of positive squares in only one way, i.e., 27738236304 + 14682168900 = 166548^2 + 121170^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589172259 + ... + 589172330.

Almost surely, 2^42420405204 is an apocalyptic number.

It is an amenable number.

42420405204 is an abundant number, since it is smaller than the sum of its proper divisors (64808952486).

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

42420405204 is a wasteful number, since it uses less digits than its factorization.

42420405204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178344599 (or 1178344594 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

Adding to 42420405204 its reverse (40250402424), we get a palindrome (82670807628).

The spelling of 42420405204 in words is "forty-two billion, four hundred twenty million, four hundred five thousand, two hundred four".