8109920436 has 12 divisors (see below), whose sum is σ = 18923147712. Its totient is φ = 2703306808.

The previous prime is 8109920411. The next prime is 8109920477. The reversal of 8109920436 is 6340299018.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337913340 + ... + 337913363.

It is an arithmetic number, because the mean of its divisors is an integer number (1576928976).

Almost surely, 2^8109920436 is an apocalyptic number.

It is an amenable number.

8109920436 is an abundant number, since it is smaller than the sum of its proper divisors (10813227276).

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

8109920436 is a wasteful number, since it uses less digits than its factorization.

8109920436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675826710 (or 675826708 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 8109920436 is about 90055.0966686506. The cubic root of 8109920436 is about 2009.1184005398.

The spelling of 8109920436 in words is "eight billion, one hundred nine million, nine hundred twenty thousand, four hundred thirty-six".