20434542025541 has 12 divisors (see below), whose sum is σ = 23805905778828. Its totient is φ = 17489449740672.

The previous prime is 20434542025537. The next prime is 20434542025561. The reversal of 20434542025541 is 14552024543402.

It can be written as a sum of positive squares in 2 ways, for example, as 18005136616516 + 2429405409025 = 4243246^2 + 1558655^2 .

It is not a de Polignac number, because 20434542025541 - 2² = 20434542025537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434542025561) 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 11 ways as a sum of consecutive naturals, for example, 307966436 + ... + 308032781.

It is an arithmetic number, because the mean of its divisors is an integer number (1983825481569).

Almost surely, 2^{20434542025541} is an apocalyptic number.

It is an amenable number.

20434542025541 is a deficient number, since it is larger than the sum of its proper divisors (3371363753287).

20434542025541 is an equidigital number, since it uses as much as digits as its factorization.

20434542025541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615999908 (or 615999901 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 41.

Adding to 20434542025541 its reverse (14552024543402), we get a palindrome (34986566568943).

The spelling of 20434542025541 in words is "twenty trillion, four hundred thirty-four billion, five hundred forty-two million, twenty-five thousand, five hundred forty-one".