20345884320 has 96 divisors (see below), whose sum is σ = 64128177792. Its totient is φ = 5422298112.

The previous prime is 20345884309. The next prime is 20345884367. The reversal of 20345884320 is 2348854302.

It is a Cunningham number, because it is equal to 142639²-1.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843954 + ... + 867726.

It is an arithmetic number, because the mean of its divisors is an integer number (668001852).

Almost surely, 2^20345884320 is an apocalyptic number.

20345884320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20345884320 is an abundant number, since it is smaller than the sum of its proper divisors (43782293472).

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

20345884320 is a wasteful number, since it uses less digits than its factorization.

20345884320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25574 (or 25566 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 20345884320 in words is "twenty billion, three hundred forty-five million, eight hundred eighty-four thousand, three hundred twenty".