320021434124 has 72 divisors (see below), whose sum is σ = 657215741952. Its totient is φ = 135944917920.

The previous prime is 320021434123. The next prime is 320021434129. The reversal of 320021434124 is 421434120023.

It is a junction number, because it is equal to n+sod(n) for n = 320021434093 and 320021434102.

It is not an unprimeable number, because it can be changed into a prime (320021434123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29541389 + ... + 29552219.

It is an arithmetic number, because the mean of its divisors is an integer number (9127996416).

Almost surely, 2^320021434124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320021434124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328607870976).

320021434124 is an abundant number, since it is smaller than the sum of its proper divisors (337194307828).

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

320021434124 is a wasteful number, since it uses less digits than its factorization.

320021434124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12163 (or 12154 counting only the distinct ones).

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

Adding to 320021434124 its reverse (421434120023), we get a palindrome (741455554147).

The spelling of 320021434124 in words is "three hundred twenty billion, twenty-one million, four hundred thirty-four thousand, one hundred twenty-four".