20542343445 has 64 divisors (see below), whose sum is σ = 39867932160. Its totient is φ = 9974555136.

The previous prime is 20542343443. The next prime is 20542343453. The reversal of 20542343445 is 54434324502.

20542343445 is a `hidden beast` number, since 205 + 4 + 2 + 3 + 4 + 3 + 445 = 666.

It is not a de Polignac number, because 20542343445 - 2¹ = 20542343443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542343443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47944 + ... + 208286.

It is an arithmetic number, because the mean of its divisors is an integer number (622936440).

Almost surely, 2^20542343445 is an apocalyptic number.

It is an amenable number.

20542343445 is a deficient number, since it is larger than the sum of its proper divisors (19325588715).

20542343445 is a wasteful number, since it uses less digits than its factorization.

20542343445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160443 (or 160437 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 36.

Adding to 20542343445 its reverse (54434324502), we get a palindrome (74976667947).

The spelling of 20542343445 in words is "twenty billion, five hundred forty-two million, three hundred forty-three thousand, four hundred forty-five".