19930117347856 has 45 divisors (see below), whose sum is σ = 40754609313453. Its totient is φ = 9440421186240.

The previous prime is 19930117347841. The next prime is 19930117347883. The reversal of 19930117347856 is 65874371103991.

The square root of 19930117347856 is 4464316.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5012601565456 + 14917515782400 = 2238884^2 + 3862320^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 339258646 + ... + 339317386.

Almost surely, 2^{19930117347856} is an apocalyptic number.

19930117347856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19930117347856 is the 4464316-th square number.

It is an amenable number.

19930117347856 is an abundant number, since it is smaller than the sum of its proper divisors (20824491965597).

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

19930117347856 is an frugal number, since it uses more digits than its factorization.

19930117347856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117528 (or 58762 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 64.

The spelling of 19930117347856 in words is "nineteen trillion, nine hundred thirty billion, one hundred seventeen million, three hundred forty-seven thousand, eight hundred fifty-six".