20013103 has 16 divisors (see below), whose sum is σ = 23126400. Its totient is φ = 17146080.

The previous prime is 20013083. The next prime is 20013107. The reversal of 20013103 is 30131002.

It is a cyclic number.

It is not a de Polignac number, because 20013103 - 2²¹ = 17915951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20013103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013107) 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 15 ways as a sum of consecutive naturals, for example, 12988 + ... + 14446.

It is an arithmetic number, because the mean of its divisors is an integer number (1445400).

Almost surely, 2^20013103 is an apocalyptic number.

20013103 is a deficient number, since it is larger than the sum of its proper divisors (3113297).

20013103 is a wasteful number, since it uses less digits than its factorization.

20013103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 20013103 is about 4473.6006750715. The cubic root of 20013103 is about 271.5010270755.

Adding to 20013103 its reverse (30131002), we get a palindrome (50144105).

The spelling of 20013103 in words is "twenty million, thirteen thousand, one hundred three".