320020403421401 has 4 divisors (see below), whose sum is σ = 320023310984100. Its totient is φ = 320017495858704.

The previous prime is 320020403421377. The next prime is 320020403421419. The reversal of 320020403421401 is 104124304020023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67365436446025 + 252654966975376 = 8207645^2 + 15895124^2 .

It is a cyclic number.

It is not a de Polignac number, because 320020403421401 - 2¹⁸ = 320020403159257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (320020403451401) 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 3 ways as a sum of consecutive naturals, for example, 1453616246 + ... + 1453836383.

It is an arithmetic number, because the mean of its divisors is an integer number (80005827746025).

Almost surely, 2^{320020403421401} is an apocalyptic number.

It is an amenable number.

320020403421401 is a deficient number, since it is larger than the sum of its proper divisors (2907562699).

320020403421401 is a wasteful number, since it uses less digits than its factorization.

320020403421401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907562698.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 320020403421401 its reverse (104124304020023), we get a palindrome (424144707441424).

The spelling of 320020403421401 in words is "three hundred twenty trillion, twenty billion, four hundred three million, four hundred twenty-one thousand, four hundred one".