20520503066115 has 48 divisors (see below), whose sum is σ = 38305578231648. Its totient is φ = 10102232936448.

The previous prime is 20520503066099. The next prime is 20520503066179. The reversal of 20520503066115 is 51166030502502.

20520503066115 is a `hidden beast` number, since 2 + 0 + 5 + 2 + 0 + 5 + 0 + 30 + 6 + 611 + 5 = 666.

It is not a de Polignac number, because 20520503066115 - 2⁴ = 20520503066099 is a prime.

It is a super-2 number, since 2×20520503066115² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20520503066115.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39390772 + ... + 39908318.

It is an arithmetic number, because the mean of its divisors is an integer number (798032879826).

Almost surely, 2^{20520503066115} is an apocalyptic number.

20520503066115 is a deficient number, since it is larger than the sum of its proper divisors (17785075165533).

20520503066115 is a wasteful number, since it uses less digits than its factorization.

20520503066115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585348 (or 585345 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 20520503066115 its reverse (51166030502502), we get a palindrome (71686533568617).

The spelling of 20520503066115 in words is "twenty trillion, five hundred twenty billion, five hundred three million, sixty-six thousand, one hundred fifteen".