20100103 has 8 divisors (see below), whose sum is σ = 22016880. Its totient is φ = 18264960.

The previous prime is 20100097. The next prime is 20100149. The reversal of 20100103 is 30100102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100103 is a prime.

It is a super-2 number, since 2×20100103² = 808028281221218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19893 + ... + 20878.

It is an arithmetic number, because the mean of its divisors is an integer number (2752110).

Almost surely, 2^20100103 is an apocalyptic number.

20100103 is a deficient number, since it is larger than the sum of its proper divisors (1916777).

20100103 is a wasteful number, since it uses less digits than its factorization.

20100103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40817.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 20100103 is about 4483.3138413455. The cubic root of 20100103 is about 271.8938771056.

Adding to 20100103 its reverse (30100102), we get a palindrome (50200205).

Subtracting 20100103 from its reverse (30100102), we obtain a palindrome (9999999).

The spelling of 20100103 in words is "twenty million, one hundred thousand, one hundred three".