20912103 has 24 divisors (see below), whose sum is σ = 32900400. Its totient is φ = 12749184.

The previous prime is 20912071. The next prime is 20912113. The reversal of 20912103 is 30121902.

It is a happy number.

It is not a de Polignac number, because 20912103 - 2⁵ = 20912071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20912113) 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 23 ways as a sum of consecutive naturals, for example, 2851 + ... + 7067.

It is an arithmetic number, because the mean of its divisors is an integer number (1370850).

Almost surely, 2^20912103 is an apocalyptic number.

20912103 is a deficient number, since it is larger than the sum of its proper divisors (11988297).

20912103 is a wasteful number, since it uses less digits than its factorization.

20912103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271 (or 4268 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20912103 is about 4572.9752896774. The cubic root of 20912103 is about 275.5069568721.

The spelling of 20912103 in words is "twenty million, nine hundred twelve thousand, one hundred three".