20201112515 has 16 divisors (see below), whose sum is σ = 24791287680. Its totient is φ = 15798307200.

The previous prime is 20201112511. The next prime is 20201112553. The reversal of 20201112515 is 51521110202.

It is not a de Polignac number, because 20201112515 - 2² = 20201112511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20201112511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213284 + ... + 293073.

It is an arithmetic number, because the mean of its divisors is an integer number (1549455480).

Almost surely, 2^20201112515 is an apocalyptic number.

20201112515 is a deficient number, since it is larger than the sum of its proper divisors (4590175165).

20201112515 is a wasteful number, since it uses less digits than its factorization.

20201112515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506542.

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 20201112515 its reverse (51521110202), we get a palindrome (71722222717).

The spelling of 20201112515 in words is "twenty billion, two hundred one million, one hundred twelve thousand, five hundred fifteen".