20179245673 has 4 divisors (see below), whose sum is σ = 20182415440. Its totient is φ = 20176075908.

The previous prime is 20179245641. The next prime is 20179245683. The reversal of 20179245673 is 37654297102.

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 20179245673 - 2⁵ = 20179245641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20179245613) 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, 1575315 + ... + 1588072.

It is an arithmetic number, because the mean of its divisors is an integer number (5045603860).

Almost surely, 2^20179245673 is an apocalyptic number.

It is an amenable number.

20179245673 is a deficient number, since it is larger than the sum of its proper divisors (3169767).

20179245673 is an equidigital number, since it uses as much as digits as its factorization.

20179245673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169766.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 20179245673 in words is "twenty billion, one hundred seventy-nine million, two hundred forty-five thousand, six hundred seventy-three".