20450003434445 has 16 divisors (see below), whose sum is σ = 26430546258480. Its totient is φ = 15099912705024.

The previous prime is 20450003434423. The next prime is 20450003434447. The reversal of 20450003434445 is 54443430005402.

It can be written as a sum of positive squares in 8 ways, for example, as 1029579561124 + 19420423873321 = 1014682^2 + 4406861^2 .

It is a cyclic number.

It is not a de Polignac number, because 20450003434445 - 2¹⁰ = 20450003433421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20450003434399 and 20450003434408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450003434447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16353740 + ... + 17559749.

It is an arithmetic number, because the mean of its divisors is an integer number (1651909141155).

Almost surely, 2^{20450003434445} is an apocalyptic number.

It is an amenable number.

20450003434445 is a deficient number, since it is larger than the sum of its proper divisors (5980542824035).

20450003434445 is a wasteful number, since it uses less digits than its factorization.

20450003434445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33922784.

The product of its (nonzero) digits is 460800, while the sum is 38.

Adding to 20450003434445 its reverse (54443430005402), we get a palindrome (74893433439847).

The spelling of 20450003434445 in words is "twenty trillion, four hundred fifty billion, three million, four hundred thirty-four thousand, four hundred forty-five".