20080815400 has 48 divisors (see below), whose sum is σ = 46724715900. Its totient is φ = 8025991680.

The previous prime is 20080815379. The next prime is 20080815407. The reversal of 20080815400 is 451808002.

It can be written as a sum of positive squares in 6 ways, for example, as 14124371716 + 5956443684 = 118846^2 + 77178^2 .

It is not an unprimeable number, because it can be changed into a prime (20080815407) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 218854 + ... + 296746.

Almost surely, 2^20080815400 is an apocalyptic number.

20080815400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20080815400 is an abundant number, since it is smaller than the sum of its proper divisors (26643900500).

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

20080815400 is a wasteful number, since it uses less digits than its factorization.

20080815400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79198 (or 79189 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The spelling of 20080815400 in words is "twenty billion, eighty million, eight hundred fifteen thousand, four hundred".