19912964603443 has 8 divisors (see below), whose sum is σ = 19984763155968. Its totient is φ = 19841176155144.

The previous prime is 19912964603423. The next prime is 19912964603489. The reversal of 19912964603443 is 34430646921991.

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-19912964603443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19912964603423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1433730 + ... + 6471592.

It is an arithmetic number, because the mean of its divisors is an integer number (2498095394496).

Almost surely, 2^{19912964603443} is an apocalyptic number.

19912964603443 is a deficient number, since it is larger than the sum of its proper divisors (71798552525).

19912964603443 is a wasteful number, since it uses less digits than its factorization.

19912964603443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5052113.

The product of its (nonzero) digits is 30233088, while the sum is 61.

The spelling of 19912964603443 in words is "nineteen trillion, nine hundred twelve billion, nine hundred sixty-four million, six hundred three thousand, four hundred forty-three".