18519192919 has 8 divisors (see below), whose sum is σ = 18689936112. Its totient is φ = 18348570240.

The previous prime is 18519192917. The next prime is 18519192941. The reversal of 18519192919 is 91929191581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18519192919 - 2¹ = 18519192917 is a prime.

It is a super-2 number, since 2×18519192919² (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 18519192919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18519192917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294652 + ... + 351934.

It is an arithmetic number, because the mean of its divisors is an integer number (2336242014).

Almost surely, 2^18519192919 is an apocalyptic number.

18519192919 is a deficient number, since it is larger than the sum of its proper divisors (170743193).

18519192919 is a wasteful number, since it uses less digits than its factorization.

18519192919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60257.

The product of its digits is 524880, while the sum is 55.

The spelling of 18519192919 in words is "eighteen billion, five hundred nineteen million, one hundred ninety-two thousand, nine hundred nineteen".