20512356480928 has 96 divisors (see below), whose sum is σ = 43747441068240. Its totient is φ = 9411384729600.

The previous prime is 20512356480919. The next prime is 20512356480947. The reversal of 20512356480928 is 82908465321502.

It can be written as a sum of positive squares in 8 ways, for example, as 1364625821584 + 19147730659344 = 1168172^2 + 4375812^2 .

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, 50939578 + ... + 51340678.

Almost surely, 2^{20512356480928} 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 20512356480928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21873720534120).

20512356480928 is an abundant number, since it is smaller than the sum of its proper divisors (23235084587312).

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

20512356480928 is a wasteful number, since it uses less digits than its factorization.

20512356480928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401850 (or 401842 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 20512356480928 in words is "twenty trillion, five hundred twelve billion, three hundred fifty-six million, four hundred eighty thousand, nine hundred twenty-eight".