4020321310400 has 42 divisors (see below), whose sum is σ = 9892503128340. Its totient is φ = 1608128523520.

The previous prime is 4020321310393. The next prime is 4020321310409. The reversal of 4020321310400 is 40131230204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (4020321310409) by changing a digit.

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, 1256348810 + ... + 1256352009.

It is an arithmetic number, because the mean of its divisors is an integer number (235535788770).

Almost surely, 2^{4020321310400} is an apocalyptic number.

4020321310400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4020321310400 is an abundant number, since it is smaller than the sum of its proper divisors (5872181817940).

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

4020321310400 is a wasteful number, since it uses less digits than its factorization.

4020321310400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512700841 (or 2512700826 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 4020321310400 its reverse (40131230204), we get a palindrome (4060452540604).

The spelling of 4020321310400 in words is "four trillion, twenty billion, three hundred twenty-one million, three hundred ten thousand, four hundred".