20615103 has 12 divisors (see below), whose sum is σ = 30470440. Its totient is φ = 13423536.

The previous prime is 20615083. The next prime is 20615113. The reversal of 20615103 is 30151602.

It is not a de Polignac number, because 20615103 - 2⁵ = 20615071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20615113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26248 + ... + 27021.

Almost surely, 2^20615103 is an apocalyptic number.

20615103 is a deficient number, since it is larger than the sum of its proper divisors (9855337).

20615103 is a wasteful number, since it uses less digits than its factorization.

20615103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53318 (or 53315 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20615103 is about 4540.3857765613. The cubic root of 20615103 is about 274.1964554475.

Adding to 20615103 its reverse (30151602), we get a palindrome (50766705).

The spelling of 20615103 in words is "twenty million, six hundred fifteen thousand, one hundred three".