20514043635444 has 18 divisors (see below), whose sum is σ = 51854943634130. Its totient is φ = 6838014545136.

The previous prime is 20514043635353. The next prime is 20514043635457. The reversal of 20514043635444 is 44453634041502.

20514043635444 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 4 + 0 + 4 + 3 + 635 + 4 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15583245743844 + 4930797891600 = 3947562^2 + 2220540^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 20514043635444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 284917272679 + ... + 284917272750.

Almost surely, 2^{20514043635444} is an apocalyptic number.

It is an amenable number.

20514043635444 is an abundant number, since it is smaller than the sum of its proper divisors (31340899998686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20514043635444 is a wasteful number, since it uses less digits than its factorization.

20514043635444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569834545439 (or 569834545434 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 45.

Adding to 20514043635444 its reverse (44453634041502), we get a palindrome (64967677676946).

The spelling of 20514043635444 in words is "twenty trillion, five hundred fourteen billion, forty-three million, six hundred thirty-five thousand, four hundred forty-four".