400020066042 has 16 divisors (see below), whose sum is σ = 800049212832. Its totient is φ = 133338508560.

The previous prime is 400020066029. The next prime is 400020066071. The reversal of 400020066042 is 240660020004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283317 + ... + 938247.

It is an arithmetic number, because the mean of its divisors is an integer number (50003075802).

Almost surely, 2^400020066042 is an apocalyptic number.

400020066042 is an abundant number, since it is smaller than the sum of its proper divisors (400029146790).

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

400020066042 is a wasteful number, since it uses less digits than its factorization.

400020066042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756733.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 400020066042 its reverse (240660020004), we get a palindrome (640680086046).

The spelling of 400020066042 in words is "four hundred billion, twenty million, sixty-six thousand, forty-two".