20675205417 has 4 divisors (see below), whose sum is σ = 27566940560. Its totient is φ = 13783470276.

The previous prime is 20675205323. The next prime is 20675205437. The reversal of 20675205417 is 71450257602.

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 20675205417 - 2¹⁹ = 20674681129 is a prime.

It is a super-2 number, since 2×20675205417² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20675205437) 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, 3445867567 + ... + 3445867572.

It is an arithmetic number, because the mean of its divisors is an integer number (6891735140).

Almost surely, 2^20675205417 is an apocalyptic number.

It is an amenable number.

20675205417 is a deficient number, since it is larger than the sum of its proper divisors (6891735143).

20675205417 is an equidigital number, since it uses as much as digits as its factorization.

20675205417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891735142.

The product of its (nonzero) digits is 117600, while the sum is 39.

The spelling of 20675205417 in words is "twenty billion, six hundred seventy-five million, two hundred five thousand, four hundred seventeen".