20315115125306 has 4 divisors (see below), whose sum is σ = 30472672687962. Its totient is φ = 10157557562652.

The previous prime is 20315115125287. The next prime is 20315115125311. The reversal of 20315115125306 is 60352151151302.

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

It can be written as a sum of positive squares in only one way, i.e., 14626456047025 + 5688659078281 = 3824455^2 + 2385091^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078778781325 + ... + 5078778781328.

Almost surely, 2^{20315115125306} is an apocalyptic number.

20315115125306 is a deficient number, since it is larger than the sum of its proper divisors (10157557562656).

20315115125306 is a wasteful number, since it uses less digits than its factorization.

20315115125306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10157557562655.

The product of its (nonzero) digits is 27000, while the sum is 35.

Adding to 20315115125306 its reverse (60352151151302), we get a palindrome (80667266276608).

The spelling of 20315115125306 in words is "twenty trillion, three hundred fifteen billion, one hundred fifteen million, one hundred twenty-five thousand, three hundred six".