19708384345 has 8 divisors (see below), whose sum is σ = 25469296776. Its totient is φ = 14553883776.

The previous prime is 19708384337. The next prime is 19708384351. The reversal of 19708384345 is 54348380791.

It can be written as a sum of positive squares in 4 ways, for example, as 36638809 + 19671745536 = 6053^2 + 140256^2 .

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 19708384345 - 2³ = 19708384337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19708384292 and 19708384301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151602892 + ... + 151603021.

It is an arithmetic number, because the mean of its divisors is an integer number (3183662097).

Almost surely, 2^19708384345 is an apocalyptic number.

It is an amenable number.

19708384345 is a deficient number, since it is larger than the sum of its proper divisors (5760912431).

19708384345 is a wasteful number, since it uses less digits than its factorization.

19708384345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303205931.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 19708384345 in words is "nineteen billion, seven hundred eight million, three hundred eighty-four thousand, three hundred forty-five".