20208468806440 has 32 divisors (see below), whose sum is σ = 45469862023680. Its totient is φ = 8083244018752.

The previous prime is 20208468806413. The next prime is 20208468806447. The reversal of 20208468806440 is 4460886480202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20208468806447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2188672 + ... + 6723631.

It is an arithmetic number, because the mean of its divisors is an integer number (1420933188240).

Almost surely, 2^{20208468806440} is an apocalyptic number.

20208468806440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20208468806440 is an abundant number, since it is smaller than the sum of its proper divisors (25261393217240).

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

20208468806440 is a wasteful number, since it uses less digits than its factorization.

20208468806440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8969001 (or 8968997 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 52.

The spelling of 20208468806440 in words is "twenty trillion, two hundred eight billion, four hundred sixty-eight million, eight hundred six thousand, four hundred forty".