2108638919 has 8 divisors (see below), whose sum is σ = 2203228512. Its totient is φ = 2014291840.

The previous prime is 2108638871. The next prime is 2108638921. The reversal of 2108638919 is 9198368012.

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 2108638919 - 2²⁰ = 2107590343 is a prime.

It is a super-2 number, since 2×2108638919² = 8892716181442977122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108638949) 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, 42734 + ... + 77739.

It is an arithmetic number, because the mean of its divisors is an integer number (275403564).

Almost surely, 2^2108638919 is an apocalyptic number.

2108638919 is a deficient number, since it is larger than the sum of its proper divisors (94589593).

2108638919 is a wasteful number, since it uses less digits than its factorization.

2108638919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121257.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 2108638919 is about 45919.9185430462. The cubic root of 2108638919 is about 1282.3327656678.

The spelling of 2108638919 in words is "two billion, one hundred eight million, six hundred thirty-eight thousand, nine hundred nineteen".