20315312332 has 48 divisors (see below), whose sum is σ = 41620902400. Its totient is φ = 8494803072.

The previous prime is 20315312309. The next prime is 20315312333. The reversal of 20315312332 is 23321351302.

It is a super-2 number, since 2×20315312332² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20315312297 and 20315312306.

It is not an unprimeable number, because it can be changed into a prime (20315312333) 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, 1155544 + ... + 1172992.

Almost surely, 2^20315312332 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 20315312332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20810451200).

20315312332 is an abundant number, since it is smaller than the sum of its proper divisors (21305590068).

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

20315312332 is a wasteful number, since it uses less digits than its factorization.

20315312332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18470 (or 18468 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 20315312332 its reverse (23321351302), we get a palindrome (43636663634).

The spelling of 20315312332 in words is "twenty billion, three hundred fifteen million, three hundred twelve thousand, three hundred thirty-two".