20309575417 has 4 divisors (see below), whose sum is σ = 20394552960. Its totient is φ = 20224597876.

The previous prime is 20309575387. The next prime is 20309575439. The reversal of 20309575417 is 71457590302.

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 20309575417 - 2¹¹ = 20309573369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20309575457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42488413 + ... + 42488890.

It is an arithmetic number, because the mean of its divisors is an integer number (5098638240).

Almost surely, 2^20309575417 is an apocalyptic number.

It is an amenable number.

20309575417 is a deficient number, since it is larger than the sum of its proper divisors (84977543).

20309575417 is an equidigital number, since it uses as much as digits as its factorization.

20309575417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84977542.

The product of its (nonzero) digits is 264600, while the sum is 43.

The spelling of 20309575417 in words is "twenty billion, three hundred nine million, five hundred seventy-five thousand, four hundred seventeen".