19530008693 has 4 divisors (see below), whose sum is σ = 21032317068. Its totient is φ = 18027700320.

The previous prime is 19530008669. The next prime is 19530008741. The reversal of 19530008693 is 39680003591.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4838871844 + 14691136849 = 69562^2 + 121207^2 .

It is a cyclic number.

It is not a de Polignac number, because 19530008693 - 2⁸ = 19530008437 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 (19530008633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751154168 + ... + 751154193.

It is an arithmetic number, because the mean of its divisors is an integer number (5258079267).

Almost surely, 2^19530008693 is an apocalyptic number.

19530008693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19530008693 is a deficient number, since it is larger than the sum of its proper divisors (1502308375).

19530008693 is a wasteful number, since it uses less digits than its factorization.

19530008693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502308374.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 19530008693 in words is "nineteen billion, five hundred thirty million, eight thousand, six hundred ninety-three".