42020040402 has 12 divisors (see below), whose sum is σ = 91043420910. Its totient is φ = 14006680128.

The previous prime is 42020040397. The next prime is 42020040427. The reversal of 42020040402 is 20404002024.

42020040402 is a `hidden beast` number, since 4 + 20 + 200 + 40 + 402 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41975404641 + 44635761 = 204879^2 + 6681^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2334446689 = 42020040402 / (4 + 2 + 0 + 2 + 0 + 0 + 4 + 0 + 4 + 0 + 2).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1167223327 + ... + 1167223362.

Almost surely, 2^42020040402 is an apocalyptic number.

42020040402 is an abundant number, since it is smaller than the sum of its proper divisors (49023380508).

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

42020040402 is a wasteful number, since it uses less digits than its factorization.

42020040402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334446697 (or 2334446694 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 42020040402 its reverse (20404002024), we get a palindrome (62424042426).

The spelling of 42020040402 in words is "forty-two billion, twenty million, forty thousand, four hundred two".