20302103 has 4 divisors (see below), whose sum is σ = 20580288. Its totient is φ = 20023920.

The previous prime is 20302099. The next prime is 20302133. The reversal of 20302103 is 30120302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30120302 = 2 ⋅15060151.

It is a cyclic number.

It is not a de Polignac number, because 20302103 - 2² = 20302099 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 (20302133) by changing a digit.

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, 138983 + ... + 139128.

It is an arithmetic number, because the mean of its divisors is an integer number (5145072).

Almost surely, 2^20302103 is an apocalyptic number.

20302103 is a deficient number, since it is larger than the sum of its proper divisors (278185).

20302103 is an equidigital number, since it uses as much as digits as its factorization.

20302103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278184.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20302103 is about 4505.7855031060. The cubic root of 20302103 is about 272.8016601565.

Adding to 20302103 its reverse (30120302), we get a palindrome (50422405).

The spelling of 20302103 in words is "twenty million, three hundred two thousand, one hundred three".