20908103 has 2 divisors, whose sum is σ = 20908104. Its totient is φ = 20908102.

The previous prime is 20908099. The next prime is 20908117. The reversal of 20908103 is 30180902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20908103 - 2² = 20908099 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20908133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10454051 + 10454052.

It is an arithmetic number, because the mean of its divisors is an integer number (10454052).

Almost surely, 2^20908103 is an apocalyptic number.

20908103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20908103 is an equidigital number, since it uses as much as digits as its factorization.

20908103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20908103 is about 4572.5379167373. The cubic root of 20908103 is about 275.4893897229.

The spelling of 20908103 in words is "twenty million, nine hundred eight thousand, one hundred three".