20808080802 has 48 divisors (see below), whose sum is σ = 45561068280. Its totient is φ = 6862752000.

The previous prime is 20808080779. The next prime is 20808080863.

20808080802 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 14405040441 + 6403040361 = 120021^2 + 80019^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3685902 + ... + 3691542.

Almost surely, 2^20808080802 is an apocalyptic number.

20808080802 is an abundant number, since it is smaller than the sum of its proper divisors (24752987478).

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

20808080802 is a wasteful number, since it uses less digits than its factorization.

20808080802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7779 (or 7776 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

It can be divided in two parts, 208080 and 80802, that added together give a palindrome (288882).

The spelling of 20808080802 in words is "twenty billion, eight hundred eight million, eighty thousand, eight hundred two".