20322231520 has 96 divisors (see below), whose sum is σ = 48658125600. Its totient is φ = 8019787776.

The previous prime is 20322231499. The next prime is 20322231569. The reversal of 20322231520 is 2513222302.

It is a junction number, because it is equal to n+sod(n) for n = 20322231491 and 20322231500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7787976 + ... + 7790584.

It is an arithmetic number, because the mean of its divisors is an integer number (506855475).

Almost surely, 2^20322231520 is an apocalyptic number.

20322231520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20322231520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24329062800).

20322231520 is an abundant number, since it is smaller than the sum of its proper divisors (28335894080).

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

20322231520 is a wasteful number, since it uses less digits than its factorization.

20322231520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260 (or 3252 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 20322231520 its reverse (2513222302), we get a palindrome (22835453822).

The spelling of 20322231520 in words is "twenty billion, three hundred twenty-two million, two hundred thirty-one thousand, five hundred twenty".