20208804400 has 60 divisors (see below), whose sum is σ = 51407649432. Its totient is φ = 7608017920.

The previous prime is 20208804389. The next prime is 20208804443. The reversal of 20208804400 is 440880202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1479142 + ... + 1492741.

Almost surely, 2^20208804400 is an apocalyptic number.

20208804400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20208804400 is an abundant number, since it is smaller than the sum of its proper divisors (31198845032).

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

20208804400 is a wasteful number, since it uses less digits than its factorization.

20208804400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971918 (or 2971907 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The spelling of 20208804400 in words is "twenty billion, two hundred eight million, eight hundred four thousand, four hundred".