206420424553 has 16 divisors (see below), whose sum is σ = 239453470080. Its totient is φ = 174273998976.

The previous prime is 206420424437. The next prime is 206420424583. The reversal of 206420424553 is 355424024602.

It is not a de Polignac number, because 206420424553 - 2¹⁷ = 206420293481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206420424583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7879725 + ... + 7905877.

It is an arithmetic number, because the mean of its divisors is an integer number (14965841880).

Almost surely, 2^206420424553 is an apocalyptic number.

It is an amenable number.

206420424553 is a deficient number, since it is larger than the sum of its proper divisors (33033045527).

206420424553 is a wasteful number, since it uses less digits than its factorization.

206420424553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43056.

The product of its (nonzero) digits is 230400, while the sum is 37.

The spelling of 206420424553 in words is "two hundred six billion, four hundred twenty million, four hundred twenty-four thousand, five hundred fifty-three".