2113919806 has 4 divisors (see below), whose sum is σ = 3170879712. Its totient is φ = 1056959902.

The previous prime is 2113919777. The next prime is 2113919851. The reversal of 2113919806 is 6089193112.

2113919806 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528479950 + ... + 528479953.

It is an arithmetic number, because the mean of its divisors is an integer number (792719928).

Almost surely, 2^2113919806 is an apocalyptic number.

2113919806 is a deficient number, since it is larger than the sum of its proper divisors (1056959906).

2113919806 is a wasteful number, since it uses less digits than its factorization.

2113919806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056959905.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 2113919806 is about 45977.3836358704. The cubic root of 2113919806 is about 1283.4023670216.

The spelling of 2113919806 in words is "two billion, one hundred thirteen million, nine hundred nineteen thousand, eight hundred six".