19004111321 has 4 divisors (see below), whose sum is σ = 20465966052. Its totient is φ = 17542256592.

The previous prime is 19004111297. The next prime is 19004111323. The reversal of 19004111321 is 12311140091.

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 7130958025 + 11873153296 = 84445^2 + 108964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19004111321 is a prime.

It is a super-2 number, since 2×19004111321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19004111323) 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, 730927346 + ... + 730927371.

It is an arithmetic number, because the mean of its divisors is an integer number (5116491513).

Almost surely, 2^19004111321 is an apocalyptic number.

It is an amenable number.

19004111321 is a deficient number, since it is larger than the sum of its proper divisors (1461854731).

19004111321 is a wasteful number, since it uses less digits than its factorization.

19004111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461854730.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 19004111321 in words is "nineteen billion, four million, one hundred eleven thousand, three hundred twenty-one".