400450043200020 has 96 divisors (see below), whose sum is σ = 1223202261052800. Its totient is φ = 97078052175360.

The previous prime is 400450043199931. The next prime is 400450043200033. The reversal of 400450043200020 is 20002340054004.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 86141514 + ... + 90671166.

It is an arithmetic number, because the mean of its divisors is an integer number (12741690219300).

Almost surely, 2^{400450043200020} is an apocalyptic number.

It is an amenable number.

400450043200020 is an abundant number, since it is smaller than the sum of its proper divisors (822752217852780).

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

400450043200020 is a wasteful number, since it uses less digits than its factorization.

400450043200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663625 (or 4663623 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

Adding to 400450043200020 its reverse (20002340054004), we get a palindrome (420452383254024).

The spelling of 400450043200020 in words is "four hundred trillion, four hundred fifty billion, forty-three million, two hundred thousand, twenty".