20238052517 has 4 divisors (see below), whose sum is σ = 20731663596. Its totient is φ = 19744441440.

The previous prime is 20238052463. The next prime is 20238052531. The reversal of 20238052517 is 71525083202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5326956196 + 14911096321 = 72986^2 + 122111^2 .

It is a cyclic number.

It is not a de Polignac number, because 20238052517 - 2²⁴ = 20221275301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20238052537) 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, 246805478 + ... + 246805559.

It is an arithmetic number, because the mean of its divisors is an integer number (5182915899).

Almost surely, 2^20238052517 is an apocalyptic number.

It is an amenable number.

20238052517 is a deficient number, since it is larger than the sum of its proper divisors (493611079).

20238052517 is an equidigital number, since it uses as much as digits as its factorization.

20238052517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493611078.

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 20238052517 in words is "twenty billion, two hundred thirty-eight million, fifty-two thousand, five hundred seventeen".