20802981200 has 30 divisors (see below), whose sum is σ = 49979163294. Its totient is φ = 8321192320.

The previous prime is 20802981167. The next prime is 20802981229. The reversal of 20802981200 is 218920802.

It can be written as a sum of positive squares in 3 ways, for example, as 6286586944 + 14516394256 = 79288^2 + 120484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26003327 + ... + 26004126.

Almost surely, 2^20802981200 is an apocalyptic number.

20802981200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20802981200 is an abundant number, since it is smaller than the sum of its proper divisors (29176182094).

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

20802981200 is a wasteful number, since it uses less digits than its factorization.

20802981200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52007471 (or 52007460 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 20802981200 in words is "twenty billion, eight hundred two million, nine hundred eighty-one thousand, two hundred".