20326331520 has 768 divisors, whose sum is σ = 82281588480. Its totient is φ = 4569169920.

The previous prime is 20326331513. The next prime is 20326331521. The reversal of 20326331520 is 2513362302.

20326331520 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 633 + 1 + 5 + 20 = 666.

It is not an unprimeable number, because it can be changed into a prime (20326331521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 121714477 + ... + 121714643.

It is an arithmetic number, because the mean of its divisors is an integer number (107137485).

Almost surely, 2^20326331520 is an apocalyptic number.

20326331520 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 20326331520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41140794240).

20326331520 is an abundant number, since it is smaller than the sum of its proper divisors (61955256960).

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

20326331520 is a wasteful number, since it uses less digits than its factorization.

20326331520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 20326331520 its reverse (2513362302), we get a palindrome (22839693822).

The spelling of 20326331520 in words is "twenty billion, three hundred twenty-six million, three hundred thirty-one thousand, five hundred twenty".