20105703 has 36 divisors (see below), whose sum is σ = 31401552. Its totient is φ = 12386880.

The previous prime is 20105693. The next prime is 20105711. The reversal of 20105703 is 30750102.

It is not a de Polignac number, because 20105703 - 2⁸ = 20105447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105753) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 195150 + ... + 195252.

Almost surely, 2^20105703 is an apocalyptic number.

20105703 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20105703 is a deficient number, since it is larger than the sum of its proper divisors (11295849).

20105703 is a wasteful number, since it uses less digits than its factorization.

20105703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 20105703 is about 4483.9383358829. The cubic root of 20105703 is about 271.9191251409.

Adding to 20105703 its reverse (30750102), we get a palindrome (50855805).

The spelling of 20105703 in words is "twenty million, one hundred five thousand, seven hundred three".