20597376709 has 32 divisors (see below), whose sum is σ = 26056832256. Its totient is φ = 15843548160.

The previous prime is 20597376707. The next prime is 20597376719. The reversal of 20597376709 is 90767379502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20597376709 - 2¹ = 20597376707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20597376709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20597376703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8136774 + ... + 8139304.

It is an arithmetic number, because the mean of its divisors is an integer number (814276008).

Almost surely, 2^20597376709 is an apocalyptic number.

It is an amenable number.

20597376709 is a deficient number, since it is larger than the sum of its proper divisors (5459455547).

20597376709 is a wasteful number, since it uses less digits than its factorization.

20597376709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005.

The product of its (nonzero) digits is 5000940, while the sum is 55.

The spelling of 20597376709 in words is "twenty billion, five hundred ninety-seven million, three hundred seventy-six thousand, seven hundred nine".