19944124063 has 4 divisors (see below), whose sum is σ = 19944506880. Its totient is φ = 19943741248.

The previous prime is 19944124061. The next prime is 19944124087. The reversal of 19944124063 is 36042144991.

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

It is a cyclic number.

It is not a de Polignac number, because 19944124063 - 2¹ = 19944124061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19944124061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98098 + ... + 222511.

It is an arithmetic number, because the mean of its divisors is an integer number (4986126720).

Almost surely, 2^19944124063 is an apocalyptic number.

19944124063 is a deficient number, since it is larger than the sum of its proper divisors (382817).

19944124063 is an equidigital number, since it uses as much as digits as its factorization.

19944124063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382816.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 19944124063 in words is "nineteen billion, nine hundred forty-four million, one hundred twenty-four thousand, sixty-three".