20520050255015 has 4 divisors (see below), whose sum is σ = 24624060306024. Its totient is φ = 16416040204008.

The previous prime is 20520050254967. The next prime is 20520050255059. The reversal of 20520050255015 is 51055205002502.

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

It is a cyclic number.

It is not a de Polignac number, because 20520050255015 - 2¹⁰ = 20520050253991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2052005025497 + ... + 2052005025506.

It is an arithmetic number, because the mean of its divisors is an integer number (6156015076506).

Almost surely, 2^{20520050255015} is an apocalyptic number.

20520050255015 is a deficient number, since it is larger than the sum of its proper divisors (4104010051009).

20520050255015 is an equidigital number, since it uses as much as digits as its factorization.

20520050255015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104010051008.

The product of its (nonzero) digits is 25000, while the sum is 32.

Adding to 20520050255015 its reverse (51055205002502), we get a palindrome (71575255257517).

The spelling of 20520050255015 in words is "twenty trillion, five hundred twenty billion, fifty million, two hundred fifty-five thousand, fifteen".