19034898821 has 4 divisors (see below), whose sum is σ = 19068709152. Its totient is φ = 19001088492.

The previous prime is 19034898803. The next prime is 19034898853. The reversal of 19034898821 is 12889843091.

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: 12889843091 = 4327 ⋅2978933.

It is a cyclic number.

It is not a de Polignac number, because 19034898821 - 2²⁶ = 18967789957 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 (19034898121) 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, 16904321 + ... + 16905446.

It is an arithmetic number, because the mean of its divisors is an integer number (4767177288).

Almost surely, 2^19034898821 is an apocalyptic number.

It is an amenable number.

19034898821 is a deficient number, since it is larger than the sum of its proper divisors (33810331).

19034898821 is an equidigital number, since it uses as much as digits as its factorization.

19034898821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33810330.

The product of its (nonzero) digits is 995328, while the sum is 53.

The spelling of 19034898821 in words is "nineteen billion, thirty-four million, eight hundred ninety-eight thousand, eight hundred twenty-one".