19806315203680 has 48 divisors (see below), whose sum is σ = 46794180266064. Its totient is φ = 7922227991040.

The previous prime is 19806315203663. The next prime is 19806315203687. The reversal of 19806315203680 is 8630251360891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19806315203687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1961494 + ... + 6592426.

It is an arithmetic number, because the mean of its divisors is an integer number (974878755543).

Almost surely, 2^{19806315203680} is an apocalyptic number.

19806315203680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19806315203680 is an abundant number, since it is smaller than the sum of its proper divisors (26987865062384).

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

19806315203680 is a wasteful number, since it uses less digits than its factorization.

19806315203680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657679 (or 4657671 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 19806315203680 in words is "nineteen trillion, eight hundred six billion, three hundred fifteen million, two hundred three thousand, six hundred eighty".