400434312542020 has 24 divisors (see below), whose sum is σ = 847331232346368. Its totient is φ = 158951024824800.

The previous prime is 400434312541993. The next prime is 400434312542027. The reversal of 400434312542020 is 20245213434004.

It is a super-2 number, since 2×400434312542020² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400434312542027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76418759316 + ... + 76418764555.

It is an arithmetic number, because the mean of its divisors is an integer number (35305468014432).

Almost surely, 2^{400434312542020} is an apocalyptic number.

It is an amenable number.

400434312542020 is an abundant number, since it is smaller than the sum of its proper divisors (446896919804348).

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

400434312542020 is a wasteful number, since it uses less digits than its factorization.

400434312542020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152837524011 (or 152837524009 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 400434312542020 its reverse (20245213434004), we get a palindrome (420679525976024).

The spelling of 400434312542020 in words is "four hundred trillion, four hundred thirty-four billion, three hundred twelve million, five hundred forty-two thousand, twenty".