20243105 has 16 divisors (see below), whose sum is σ = 25608960. Its totient is φ = 15331008.

The previous prime is 20243101. The next prime is 20243117. The reversal of 20243105 is 50134202.

It is a cyclic number.

It is not a de Polignac number, because 20243105 - 2² = 20243101 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20243101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10991 + ... + 12699.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560).

Almost surely, 2^20243105 is an apocalyptic number.

It is an amenable number.

20243105 is a deficient number, since it is larger than the sum of its proper divisors (5365855).

20243105 is a wasteful number, since it uses less digits than its factorization.

20243105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20243105 is about 4499.2338236638. The cubic root of 20243105 is about 272.5371494957.

Adding to 20243105 its reverse (50134202), we get a palindrome (70377307).

The spelling of 20243105 in words is "twenty million, two hundred forty-three thousand, one hundred five".