20102603 has 4 divisors (see below), whose sum is σ = 20198088. Its totient is φ = 20007120.

The previous prime is 20102591. The next prime is 20102609. The reversal of 20102603 is 30620102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30620102 = 2 ⋅15310051.

It is a cyclic number.

It is not a de Polignac number, because 20102603 - 2¹⁰ = 20101579 is a prime.

It is a super-2 number, since 2×20102603² = 808229294751218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47426 + ... + 47847.

It is an arithmetic number, because the mean of its divisors is an integer number (5049522).

Almost surely, 2^20102603 is an apocalyptic number.

20102603 is a deficient number, since it is larger than the sum of its proper divisors (95485).

20102603 is an equidigital number, since it uses as much as digits as its factorization.

20102603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95484.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20102603 is about 4483.5926442977. The cubic root of 20102603 is about 271.9051491293.

Adding to 20102603 its reverse (30620102), we get a palindrome (50722705).

The spelling of 20102603 in words is "twenty million, one hundred two thousand, six hundred three".