19391663014 has 4 divisors (see below), whose sum is σ = 29087494524. Its totient is φ = 9695831506.

The previous prime is 19391662937. The next prime is 19391663041. The reversal of 19391663014 is 41036619391.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4847915752 + ... + 4847915755.

It is an arithmetic number, because the mean of its divisors is an integer number (7271873631).

Almost surely, 2^19391663014 is an apocalyptic number.

19391663014 is a deficient number, since it is larger than the sum of its proper divisors (9695831510).

19391663014 is an equidigital number, since it uses as much as digits as its factorization.

19391663014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9695831509.

The product of its (nonzero) digits is 104976, while the sum is 43.

The spelling of 19391663014 in words is "nineteen billion, three hundred ninety-one million, six hundred sixty-three thousand, fourteen".