420323440321 has 4 divisors (see below), whose sum is σ = 424485058644. Its totient is φ = 416161822000.

The previous prime is 420323440309. The next prime is 420323440337. The reversal of 420323440321 is 123044323024.

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 312440753296 + 107882687025 = 558964^2 + 328455^2 .

It is a cyclic number.

It is not a de Polignac number, because 420323440321 - 2¹¹ = 420323438273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420323440321.

It is not an unprimeable number, because it can be changed into a prime (420323440391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2080809010 + ... + 2080809211.

It is an arithmetic number, because the mean of its divisors is an integer number (106121264661).

Almost surely, 2^420323440321 is an apocalyptic number.

It is an amenable number.

420323440321 is a deficient number, since it is larger than the sum of its proper divisors (4161618323).

420323440321 is a wasteful number, since it uses less digits than its factorization.

420323440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161618322.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 420323440321 its reverse (123044323024), we get a palindrome (543367763345).

The spelling of 420323440321 in words is "four hundred twenty billion, three hundred twenty-three million, four hundred forty thousand, three hundred twenty-one".