20512800000 has 1296 divisors, whose sum is σ = 94656691584. Its totient is φ = 4147200000.

The previous prime is 20512799971. The next prime is 20512800001. The reversal of 20512800000 is 821502.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512800001) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 554399982 + ... + 554400018.

Almost surely, 2^20512800000 is an apocalyptic number.

20512800000 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 20512800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47328345792).

20512800000 is an abundant number, since it is smaller than the sum of its proper divisors (74143891584).

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

20512800000 is an equidigital number, since it uses as much as digits as its factorization.

20512800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The spelling of 20512800000 in words is "twenty billion, five hundred twelve million, eight hundred thousand".