20703043105 has 16 divisors (see below), whose sum is σ = 26329227984. Its totient is φ = 15573841920.

The previous prime is 20703043099. The next prime is 20703043121. The reversal of 20703043105 is 50134030702.

It can be written as a sum of positive squares in 8 ways, for example, as 3612971664 + 17090071441 = 60108^2 + 130729^2 .

It is not a de Polignac number, because 20703043105 - 2⁷ = 20703042977 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 20703043105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18516 + ... + 204325.

It is an arithmetic number, because the mean of its divisors is an integer number (1645576749).

Almost surely, 2^20703043105 is an apocalyptic number.

It is an amenable number.

20703043105 is a deficient number, since it is larger than the sum of its proper divisors (5626184879).

20703043105 is a wasteful number, since it uses less digits than its factorization.

20703043105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223956.

The product of its (nonzero) digits is 2520, while the sum is 25.

Adding to 20703043105 its reverse (50134030702), we get a palindrome (70837073807).

The spelling of 20703043105 in words is "twenty billion, seven hundred three million, forty-three thousand, one hundred five".