42020405550 has 72 divisors (see below), whose sum is σ = 112930001184. Its totient is φ = 11201950080.

The previous prime is 42020405549. The next prime is 42020405563. The reversal of 42020405550 is 5550402024.

42020405550 is a `hidden beast` number, since 4 + 202 + 0 + 405 + 5 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1640139 + ... + 1665561.

Almost surely, 2^42020405550 is an apocalyptic number.

42020405550 is an abundant number, since it is smaller than the sum of its proper divisors (70909595634).

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

42020405550 is a wasteful number, since it uses less digits than its factorization.

42020405550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29114 (or 29106 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

Adding to 42020405550 its reverse (5550402024), we get a palindrome (47570807574).

The spelling of 42020405550 in words is "forty-two billion, twenty million, four hundred five thousand, five hundred fifty".