20105210435 has 4 divisors (see below), whose sum is σ = 24126252528. Its totient is φ = 16084168344.

The previous prime is 20105210423. The next prime is 20105210471. The reversal of 20105210435 is 53401250102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20105210435 - 2²⁶ = 20038101571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20105210435.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010521039 + ... + 2010521048.

It is an arithmetic number, because the mean of its divisors is an integer number (6031563132).

Almost surely, 2^20105210435 is an apocalyptic number.

20105210435 is a deficient number, since it is larger than the sum of its proper divisors (4021042093).

20105210435 is an equidigital number, since it uses as much as digits as its factorization.

20105210435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4021042092.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20105210435 its reverse (53401250102), we get a palindrome (73506460537).

The spelling of 20105210435 in words is "twenty billion, one hundred five million, two hundred ten thousand, four hundred thirty-five".