18871379196 has 48 divisors (see below), whose sum is σ = 46466568960. Its totient is φ = 5944492800.

The previous prime is 18871379179. The next prime is 18871379209. The reversal of 18871379196 is 69197317881.

It is a super-2 number, since 2×18871379196² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11776 + ... + 194631.

It is an arithmetic number, because the mean of its divisors is an integer number (968053520).

Almost surely, 2^18871379196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18871379196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23233284480).

18871379196 is an abundant number, since it is smaller than the sum of its proper divisors (27595189764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18871379196 is a wasteful number, since it uses less digits than its factorization.

18871379196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206834 (or 206832 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 60.

The spelling of 18871379196 in words is "eighteen billion, eight hundred seventy-one million, three hundred seventy-nine thousand, one hundred ninety-six".