320320020043 has 16 divisors (see below), whose sum is σ = 330169840000. Its totient is φ = 310534342272.

The previous prime is 320320019951. The next prime is 320320020049. The reversal of 320320020043 is 340020023023.

It is a cyclic number.

It is not a de Polignac number, because 320320020043 - 2¹⁷ = 320319888971 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 320320020043.

It is not an unprimeable number, because it can be changed into a prime (320320020049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18443998 + ... + 18461356.

It is an arithmetic number, because the mean of its divisors is an integer number (20635615000).

Almost surely, 2^320320020043 is an apocalyptic number.

320320020043 is a deficient number, since it is larger than the sum of its proper divisors (9849819957).

320320020043 is a wasteful number, since it uses less digits than its factorization.

320320020043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19174.

The product of its (nonzero) digits is 864, while the sum is 19.

Adding to 320320020043 its reverse (340020023023), we get a palindrome (660340043066).

The spelling of 320320020043 in words is "three hundred twenty billion, three hundred twenty million, twenty thousand, forty-three".