20320433340 has 24 divisors (see below), whose sum is σ = 56897213520. Its totient is φ = 5418782208.

The previous prime is 20320433333. The next prime is 20320433389. The reversal of 20320433340 is 4333402302.

It is a super-2 number, since 2×20320433340² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20320433340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169336885 + ... + 169337004.

It is an arithmetic number, because the mean of its divisors is an integer number (2370717230).

Almost surely, 2^20320433340 is an apocalyptic number.

20320433340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320433340 is an abundant number, since it is smaller than the sum of its proper divisors (36576780180).

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

20320433340 is a wasteful number, since it uses less digits than its factorization.

20320433340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338673901 (or 338673899 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 24.

Adding to 20320433340 its reverse (4333402302), we get a palindrome (24653835642).

The spelling of 20320433340 in words is "twenty billion, three hundred twenty million, four hundred thirty-three thousand, three hundred forty".