20179885417 has 4 divisors (see below), whose sum is σ = 20182111360. Its totient is φ = 20177659476.

The previous prime is 20179885403. The next prime is 20179885471. The reversal of 20179885417 is 71458897102.

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 20179885417 - 2⁷ = 20179885289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20179885487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099317 + ... + 1117522.

It is an arithmetic number, because the mean of its divisors is an integer number (5045527840).

Almost surely, 2^20179885417 is an apocalyptic number.

It is an amenable number.

20179885417 is a deficient number, since it is larger than the sum of its proper divisors (2225943).

20179885417 is an equidigital number, since it uses as much as digits as its factorization.

20179885417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225942.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 20179885417 in words is "twenty billion, one hundred seventy-nine million, eight hundred eighty-five thousand, four hundred seventeen".