203683368681 has 96 divisors (see below), whose sum is σ = 342108748800. Its totient is φ = 115695267840.

The previous prime is 203683368677. The next prime is 203683368689. The reversal of 203683368681 is 186863386302.

It is not a de Polignac number, because 203683368681 - 2² = 203683368677 is a prime.

It is a super-2 number, since 2×203683368681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (203683368689) 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 95 ways as a sum of consecutive naturals, for example, 131154001 + ... + 131155553.

It is an arithmetic number, because the mean of its divisors is an integer number (3563632800).

Almost surely, 2^203683368681 is an apocalyptic number.

It is an amenable number.

203683368681 is a deficient number, since it is larger than the sum of its proper divisors (138425380119).

203683368681 is a wasteful number, since it uses less digits than its factorization.

203683368681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071 (or 3068 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 203683368681 in words is "two hundred three billion, six hundred eighty-three million, three hundred sixty-eight thousand, six hundred eighty-one".