1811996108 has 24 divisors (see below), whose sum is σ = 3428545680. Its totient is φ = 832968000.

The previous prime is 1811996099. The next prime is 1811996111. The reversal of 1811996108 is 8016991181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56363 + ... + 82466.

It is an arithmetic number, because the mean of its divisors is an integer number (142856070).

Almost surely, 2^1811996108 is an apocalyptic number.

It is an amenable number.

1811996108 is a deficient number, since it is larger than the sum of its proper divisors (1616549572).

1811996108 is a wasteful number, since it uses less digits than its factorization.

1811996108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139097 (or 139095 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 44.

The square root of 1811996108 is about 42567.5475920331. The cubic root of 1811996108 is about 1219.1367421750.

The spelling of 1811996108 in words is "one billion, eight hundred eleven million, nine hundred ninety-six thousand, one hundred eight".