20309108744 has 64 divisors (see below), whose sum is σ = 40158720000. Its totient is φ = 9610032960.

The previous prime is 20309108693. The next prime is 20309108779. The reversal of 20309108744 is 44780190302.

It is a junction number, because it is equal to n+sod(n) for n = 20309108698 and 20309108707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8464457 + ... + 8466855.

It is an arithmetic number, because the mean of its divisors is an integer number (627480000).

Almost surely, 2^20309108744 is an apocalyptic number.

It is an amenable number.

20309108744 is a deficient number, since it is larger than the sum of its proper divisors (19849611256).

20309108744 is a wasteful number, since it uses less digits than its factorization.

20309108744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2894 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 20309108744 in words is "twenty billion, three hundred nine million, one hundred eight thousand, seven hundred forty-four".