20673380109 has 4 divisors (see below), whose sum is σ = 27564506816. Its totient is φ = 13782253404.

The previous prime is 20673380081. The next prime is 20673380113. The reversal of 20673380109 is 90108337602.

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 20673380109 - 2¹² = 20673376013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673380149) 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, 3445563349 + ... + 3445563354.

It is an arithmetic number, because the mean of its divisors is an integer number (6891126704).

Almost surely, 2^20673380109 is an apocalyptic number.

It is an amenable number.

20673380109 is a deficient number, since it is larger than the sum of its proper divisors (6891126707).

20673380109 is an equidigital number, since it uses as much as digits as its factorization.

20673380109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891126706.

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 20673380109 in words is "twenty billion, six hundred seventy-three million, three hundred eighty thousand, one hundred nine".