20134134209 has 4 divisors (see below), whose sum is σ = 23010439104. Its totient is φ = 17257829316.

The previous prime is 20134134089. The next prime is 20134134257. The reversal of 20134134209 is 90243143102.

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 20134134209 - 2⁸ = 20134133953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20134130209) 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, 1438152437 + ... + 1438152450.

It is an arithmetic number, because the mean of its divisors is an integer number (5752609776).

Almost surely, 2^20134134209 is an apocalyptic number.

It is an amenable number.

20134134209 is a deficient number, since it is larger than the sum of its proper divisors (2876304895).

20134134209 is an equidigital number, since it uses as much as digits as its factorization.

20134134209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2876304894.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 20134134209 in words is "twenty billion, one hundred thirty-four million, one hundred thirty-four thousand, two hundred nine".