20123179289 has 4 divisors (see below), whose sum is σ = 20126945280. Its totient is φ = 20119413300.

The previous prime is 20123179277. The next prime is 20123179303. The reversal of 20123179289 is 98297132102.

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 a cyclic number.

It is not a de Polignac number, because 20123179289 - 2¹⁶ = 20123113753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123179589) 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, 1874969 + ... + 1885670.

It is an arithmetic number, because the mean of its divisors is an integer number (5031736320).

Almost surely, 2^20123179289 is an apocalyptic number.

It is an amenable number.

20123179289 is a deficient number, since it is larger than the sum of its proper divisors (3765991).

20123179289 is an equidigital number, since it uses as much as digits as its factorization.

20123179289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765990.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 20123179289 in words is "twenty billion, one hundred twenty-three million, one hundred seventy-nine thousand, two hundred eighty-nine".