20242615 has 4 divisors (see below), whose sum is σ = 24291144. Its totient is φ = 16194088.

The previous prime is 20242603. The next prime is 20242687. The reversal of 20242615 is 51624202.

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

It is a cyclic number.

It is not a de Polignac number, because 20242615 - 2¹⁹ = 19718327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2024257 + ... + 2024266.

It is an arithmetic number, because the mean of its divisors is an integer number (6072786).

Almost surely, 2^20242615 is an apocalyptic number.

20242615 is a deficient number, since it is larger than the sum of its proper divisors (4048529).

20242615 is an equidigital number, since it uses as much as digits as its factorization.

20242615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048528.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20242615 is about 4499.1793696184. The cubic root of 20242615 is about 272.5349504872.

Adding to 20242615 its reverse (51624202), we get a palindrome (71866817).

The spelling of 20242615 in words is "twenty million, two hundred forty-two thousand, six hundred fifteen".