20103775 has 12 divisors (see below), whose sum is σ = 26395632. Its totient is φ = 15136640.

The previous prime is 20103773. The next prime is 20103781. The reversal of 20103775 is 57730102.

It is not a de Polignac number, because 20103775 - 2¹ = 20103773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23227 + ... + 24076.

It is an arithmetic number, because the mean of its divisors is an integer number (2199636).

Almost surely, 2^20103775 is an apocalyptic number.

20103775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20103775 is a deficient number, since it is larger than the sum of its proper divisors (6291857).

20103775 is a wasteful number, since it uses less digits than its factorization.

20103775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47330 (or 47325 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 20103775 is about 4483.7233411530. The cubic root of 20103775 is about 271.9104331323.

Adding to 20103775 its reverse (57730102), we get a palindrome (77833877).

The spelling of 20103775 in words is "twenty million, one hundred three thousand, seven hundred seventy-five".