18538892819 has 8 divisors (see below), whose sum is σ = 20662543440. Its totient is φ = 16530034176.

The previous prime is 18538892807. The next prime is 18538892861. The reversal of 18538892819 is 91829883581.

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 18538892819 - 2¹² = 18538888723 is a prime.

It is a super-2 number, since 2×18538892819² (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 (18538892899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28697654 + ... + 28698299.

It is an arithmetic number, because the mean of its divisors is an integer number (2582817930).

Almost surely, 2^18538892819 is an apocalyptic number.

18538892819 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18538892819 is a deficient number, since it is larger than the sum of its proper divisors (2123650621).

18538892819 is a wasteful number, since it uses less digits than its factorization.

18538892819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57395989.

The product of its digits is 9953280, while the sum is 62.

The spelling of 18538892819 in words is "eighteen billion, five hundred thirty-eight million, eight hundred ninety-two thousand, eight hundred nineteen".