19699914521 has 8 divisors (see below), whose sum is σ = 23037774144. Its totient is φ = 16492951440.

The previous prime is 19699914511. The next prime is 19699914523. The reversal of 19699914521 is 12541999691.

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

It is a de Polignac number, because none of the positive numbers 2^k-19699914521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19699914523) 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, 32723810 + ... + 32724411.

It is an arithmetic number, because the mean of its divisors is an integer number (2879721768).

Almost surely, 2^19699914521 is an apocalyptic number.

It is an amenable number.

19699914521 is a deficient number, since it is larger than the sum of its proper divisors (3337859623).

19699914521 is an equidigital number, since it uses as much as digits as its factorization.

19699914521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65448271.

The product of its digits is 1574640, while the sum is 56.

The spelling of 19699914521 in words is "nineteen billion, six hundred ninety-nine million, nine hundred fourteen thousand, five hundred twenty-one".