20242115515 has 4 divisors (see below), whose sum is σ = 24290538624. Its totient is φ = 16193692408.

The previous prime is 20242115513. The next prime is 20242115521. The reversal of 20242115515 is 51551124202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51551124202 = 2 ⋅25775562101.

It is a cyclic number.

It is not a de Polignac number, because 20242115515 - 2¹ = 20242115513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20242115513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2024211547 + ... + 2024211556.

It is an arithmetic number, because the mean of its divisors is an integer number (6072634656).

Almost surely, 2^20242115515 is an apocalyptic number.

20242115515 is a deficient number, since it is larger than the sum of its proper divisors (4048423109).

20242115515 is an equidigital number, since it uses as much as digits as its factorization.

20242115515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048423108.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 20242115515 its reverse (51551124202), we get a palindrome (71793239717).

The spelling of 20242115515 in words is "twenty billion, two hundred forty-two million, one hundred fifteen thousand, five hundred fifteen".