20105243403 has 8 divisors (see below), whose sum is σ = 30636561408. Its totient is φ = 11488710504.

The previous prime is 20105243401. The next prime is 20105243441. The reversal of 20105243403 is 30434250102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20105243403 - 2¹ = 20105243401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20105243401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478696251 + ... + 478696292.

It is an arithmetic number, because the mean of its divisors is an integer number (3829570176).

Almost surely, 2^20105243403 is an apocalyptic number.

20105243403 is a deficient number, since it is larger than the sum of its proper divisors (10531318005).

20105243403 is an equidigital number, since it uses as much as digits as its factorization.

20105243403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957392553.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20105243403 its reverse (30434250102), we get a palindrome (50539493505).

The spelling of 20105243403 in words is "twenty billion, one hundred five million, two hundred forty-three thousand, four hundred three".