20902103 has 2 divisors, whose sum is σ = 20902104. Its totient is φ = 20902102.

The previous prime is 20902081. The next prime is 20902111. The reversal of 20902103 is 30120902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20902103 - 2⁶ = 20902039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20902303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10451051 + 10451052.

It is an arithmetic number, because the mean of its divisors is an integer number (10451052).

Almost surely, 2^20902103 is an apocalyptic number.

20902103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20902103 is an equidigital number, since it uses as much as digits as its factorization.

20902103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 20902103 is about 4571.8817788740. The cubic root of 20902103 is about 275.4630347976.

The spelling of 20902103 in words is "twenty million, nine hundred two thousand, one hundred three".