20761105 has 8 divisors (see below), whose sum is σ = 24945192. Its totient is φ = 16587648.

The previous prime is 20761099. The next prime is 20761159. The reversal of 20761105 is 50116702.

It can be written as a sum of positive squares in 4 ways, for example, as 7750656 + 13010449 = 2784^2 + 3607^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20761105 - 2¹⁷ = 20630033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2587 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (3118149).

Almost surely, 2^20761105 is an apocalyptic number.

It is an amenable number.

20761105 is a deficient number, since it is larger than the sum of its proper divisors (4184087).

20761105 is an equidigital number, since it uses as much as digits as its factorization.

20761105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5315.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 20761105 is about 4556.4355586357. The cubic root of 20761105 is about 274.8422456093.

Adding to 20761105 its reverse (50116702), we get a palindrome (70877807).

The spelling of 20761105 in words is "twenty million, seven hundred sixty-one thousand, one hundred five".