203455434105 has 48 divisors (see below), whose sum is σ = 439675127424. Its totient is φ = 84552906240.

The previous prime is 203455434073. The next prime is 203455434107. The reversal of 203455434105 is 501434554302.

203455434105 is a `hidden beast` number, since 2 + 0 + 3 + 4 + 5 + 543 + 4 + 105 = 666.

It is not a de Polignac number, because 203455434105 - 2⁵ = 203455434073 is a prime.

It is a super-2 number, since 2×203455434105² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 203455434105.

It is not an unprimeable number, because it can be changed into a prime (203455434107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29355184 + ... + 29362113.

It is an arithmetic number, because the mean of its divisors is an integer number (9159898488).

Almost surely, 2^203455434105 is an apocalyptic number.

It is an amenable number.

203455434105 is an abundant number, since it is smaller than the sum of its proper divisors (236219693319).

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

203455434105 is a wasteful number, since it uses less digits than its factorization.

203455434105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58717326 (or 58717323 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 203455434105 its reverse (501434554302), we get a palindrome (704889988407).

The spelling of 203455434105 in words is "two hundred three billion, four hundred fifty-five million, four hundred thirty-four thousand, one hundred five".