20315115125305 has 32 divisors (see below), whose sum is σ = 32731486195968. Its totient is φ = 11689816492800.

The previous prime is 20315115125287. The next prime is 20315115125311. The reversal of 20315115125305 is 50352151151302.

It is a happy number.

It is not a de Polignac number, because 20315115125305 - 2⁵ = 20315115125273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2029477026 + ... + 2029487035.

It is an arithmetic number, because the mean of its divisors is an integer number (1022858943624).

Almost surely, 2^{20315115125305} is an apocalyptic number.

It is an amenable number.

20315115125305 is a deficient number, since it is larger than the sum of its proper divisors (12416371070663).

20315115125305 is a wasteful number, since it uses less digits than its factorization.

20315115125305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058964097.

The product of its (nonzero) digits is 22500, while the sum is 34.

Adding to 20315115125305 its reverse (50352151151302), we get a palindrome (70667266276607).

The spelling of 20315115125305 in words is "twenty trillion, three hundred fifteen billion, one hundred fifteen million, one hundred twenty-five thousand, three hundred five".