20800228040 has 16 divisors (see below), whose sum is σ = 46800513180. Its totient is φ = 8320091200.

The previous prime is 20800228027. The next prime is 20800228067. The reversal of 20800228040 is 4082200802.

It can be written as a sum of positive squares in 2 ways, for example, as 20745793156 + 54434884 = 144034^2 + 7378^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260002811 + ... + 260002890.

Almost surely, 2^20800228040 is an apocalyptic number.

20800228040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20800228040 is an abundant number, since it is smaller than the sum of its proper divisors (26000285140).

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

20800228040 is a wasteful number, since it uses less digits than its factorization.

20800228040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520005712 (or 520005708 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 20800228040 its reverse (4082200802), we get a palindrome (24882428842).

The spelling of 20800228040 in words is "twenty billion, eight hundred million, two hundred twenty-eight thousand, forty".