20005115705015 has 64 divisors (see below), whose sum is σ = 29299523420160. Its totient is φ = 12816490014720.

The previous prime is 20005115705009. The next prime is 20005115705053. The reversal of 20005115705015 is 51050751150002.

It is not a de Polignac number, because 20005115705015 - 2⁸ = 20005115704759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 694197887 + ... + 694226703.

It is an arithmetic number, because the mean of its divisors is an integer number (457805053440).

Almost surely, 2^{20005115705015} is an apocalyptic number.

20005115705015 is a deficient number, since it is larger than the sum of its proper divisors (9294407715145).

20005115705015 is a wasteful number, since it uses less digits than its factorization.

20005115705015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50952.

The product of its (nonzero) digits is 8750, while the sum is 32.

Adding to 20005115705015 its reverse (51050751150002), we get a palindrome (71055866855017).

The spelling of 20005115705015 in words is "twenty trillion, five billion, one hundred fifteen million, seven hundred five thousand, fifteen".