320420423439 has 12 divisors (see below), whose sum is σ = 474118025472. Its totient is φ = 208403527200.

The previous prime is 320420423431. The next prime is 320420423441. The reversal of 320420423439 is 934324024023.

320420423439 is a `hidden beast` number, since 3 + 204 + 20 + 423 + 4 + 3 + 9 = 666.

It is not a de Polignac number, because 320420423439 - 2³ = 320420423431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320420423431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 434173647 + ... + 434174384.

It is an arithmetic number, because the mean of its divisors is an integer number (39509835456).

Almost surely, 2^320420423439 is an apocalyptic number.

320420423439 is a deficient number, since it is larger than the sum of its proper divisors (153697602033).

320420423439 is a wasteful number, since it uses less digits than its factorization.

320420423439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868348078 (or 868348075 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The spelling of 320420423439 in words is "three hundred twenty billion, four hundred twenty million, four hundred twenty-three thousand, four hundred thirty-nine".