203533520645 has 16 divisors (see below), whose sum is σ = 300603354240. Its totient is φ = 128830008384.

The previous prime is 203533520581. The next prime is 203533520677. The reversal of 203533520645 is 546025335302.

203533520645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203533520645 - 2⁶ = 203533520581 is a prime.

It is a super-2 number, since 2×203533520645² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203533520599 and 203533520608.

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 15 ways as a sum of consecutive naturals, for example, 223662755 + ... + 223663664.

It is an arithmetic number, because the mean of its divisors is an integer number (18787709640).

Almost surely, 2^203533520645 is an apocalyptic number.

It is an amenable number.

203533520645 is a deficient number, since it is larger than the sum of its proper divisors (97069833595).

203533520645 is a wasteful number, since it uses less digits than its factorization.

203533520645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447326444.

The product of its (nonzero) digits is 324000, while the sum is 38.

Adding to 203533520645 its reverse (546025335302), we get a palindrome (749558855947).

The spelling of 203533520645 in words is "two hundred three billion, five hundred thirty-three million, five hundred twenty thousand, six hundred forty-five".