19778352313 has 8 divisors (see below), whose sum is σ = 20946359808. Its totient is φ = 18610853184.

The previous prime is 19778352301. The next prime is 19778352383. The reversal of 19778352313 is 31325387791.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19778352313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19778352383) 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, 45481 + ... + 204022.

It is an arithmetic number, because the mean of its divisors is an integer number (2618294976).

Almost surely, 2^19778352313 is an apocalyptic number.

It is an amenable number.

19778352313 is a deficient number, since it is larger than the sum of its proper divisors (1168007495).

19778352313 is a wasteful number, since it uses less digits than its factorization.

19778352313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254183.

The product of its digits is 952560, while the sum is 49.

The spelling of 19778352313 in words is "nineteen billion, seven hundred seventy-eight million, three hundred fifty-two thousand, three hundred thirteen".