19030495813 has 4 divisors (see below), whose sum is σ = 21749138080. Its totient is φ = 16311853548.

The previous prime is 19030495789. The next prime is 19030495829. The reversal of 19030495813 is 31859403091.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31859403091 = 19 ⋅1676810689.

It is a cyclic number.

It is not a de Polignac number, because 19030495813 - 2⁹ = 19030495301 is a prime.

It is a super-2 number, since 2×19030495813² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19030495813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19030495613) 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, 1359321123 + ... + 1359321136.

It is an arithmetic number, because the mean of its divisors is an integer number (5437284520).

Almost surely, 2^19030495813 is an apocalyptic number.

It is an amenable number.

19030495813 is a deficient number, since it is larger than the sum of its proper divisors (2718642267).

19030495813 is an equidigital number, since it uses as much as digits as its factorization.

19030495813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718642266.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 19030495813 in words is "nineteen billion, thirty million, four hundred ninety-five thousand, eight hundred thirteen".