19381921914997 has 8 divisors (see below), whose sum is σ = 19397822245632. Its totient is φ = 19366025439600.

The previous prime is 19381921914983. The next prime is 19381921915019. The reversal of 19381921914997 is 79941912918391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19381921914997 - 2²⁷ = 19381787697269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19381921914917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9138547 + ... + 11057887.

It is an arithmetic number, because the mean of its divisors is an integer number (2424727780704).

Almost surely, 2^{19381921914997} is an apocalyptic number.

It is an amenable number.

19381921914997 is a deficient number, since it is larger than the sum of its proper divisors (15900330635).

19381921914997 is a wasteful number, since it uses less digits than its factorization.

19381921914997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927619.

The product of its digits is 79361856, while the sum is 73.

The spelling of 19381921914997 in words is "nineteen trillion, three hundred eighty-one billion, nine hundred twenty-one million, nine hundred fourteen thousand, nine hundred ninety-seven".