19962430993 has 4 divisors (see below), whose sum is σ = 19991659248. Its totient is φ = 19933202740.

The previous prime is 19962430967. The next prime is 19962431017. The reversal of 19962430993 is 39903426991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19962430993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19962430903) 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, 14613103 + ... + 14614468.

It is an arithmetic number, because the mean of its divisors is an integer number (4997914812).

Almost surely, 2^19962430993 is an apocalyptic number.

It is an amenable number.

19962430993 is a deficient number, since it is larger than the sum of its proper divisors (29228255).

19962430993 is an equidigital number, since it uses as much as digits as its factorization.

19962430993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29228254.

The product of its (nonzero) digits is 2834352, while the sum is 55.

The spelling of 19962430993 in words is "nineteen billion, nine hundred sixty-two million, four hundred thirty thousand, nine hundred ninety-three".