20828090000 has 100 divisors (see below), whose sum is σ = 52166473260. Its totient is φ = 8043840000.

The previous prime is 20828089993. The next prime is 20828090027. The reversal of 20828090000 is 9082802.

It can be written as a sum of positive squares in 10 ways, for example, as 20510822656 + 317267344 = 143216^2 + 17812^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 254090 + ... + 325910.

Almost surely, 2^20828090000 is an apocalyptic number.

20828090000 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 20828090000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26083236630).

20828090000 is an abundant number, since it is smaller than the sum of its proper divisors (31338383260).

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

20828090000 is an equidigital number, since it uses as much as digits as its factorization.

20828090000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71878 (or 71857 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 20828090000 in words is "twenty billion, eight hundred twenty-eight million, ninety thousand".