20208839940400 has 120 divisors (see below), whose sum is σ = 51618584011680. Its totient is φ = 7586189445120.

The previous prime is 20208839940329. The next prime is 20208839940403. The reversal of 20208839940400 is 404993880202.

It is not an unprimeable number, because it can be changed into a prime (20208839940403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20235165 + ... + 21210364.

It is an arithmetic number, because the mean of its divisors is an integer number (430154866764).

Almost surely, 2^{20208839940400} is an apocalyptic number.

20208839940400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20208839940400 is an abundant number, since it is smaller than the sum of its proper divisors (31409744071280).

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

20208839940400 is a wasteful number, since it uses less digits than its factorization.

20208839940400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41445623 (or 41445612 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 20208839940400 in words is "twenty trillion, two hundred eight billion, eight hundred thirty-nine million, nine hundred forty thousand, four hundred".