20169375609 has 4 divisors (see below), whose sum is σ = 26892500816. Its totient is φ = 13446250404.

The previous prime is 20169375601. The next prime is 20169375647. The reversal of 20169375609 is 90657396102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20169375609 - 2³ = 20169375601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20169375601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3361562599 + ... + 3361562604.

It is an arithmetic number, because the mean of its divisors is an integer number (6723125204).

Almost surely, 2^20169375609 is an apocalyptic number.

It is an amenable number.

20169375609 is a deficient number, since it is larger than the sum of its proper divisors (6723125207).

20169375609 is an equidigital number, since it uses as much as digits as its factorization.

20169375609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6723125206.

The product of its (nonzero) digits is 612360, while the sum is 48.

The spelling of 20169375609 in words is "twenty billion, one hundred sixty-nine million, three hundred seventy-five thousand, six hundred nine".