203084398781 has 24 divisors (see below), whose sum is σ = 224685901440. Its totient is φ = 183416698080.

The previous prime is 203084398771. The next prime is 203084398789. The reversal of 203084398781 is 187893480302.

It is a de Polignac number, because none of the positive numbers 2^k-203084398781 is a prime.

It is a super-2 number, since 2×203084398781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203084398789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17323640 + ... + 17335358.

It is an arithmetic number, because the mean of its divisors is an integer number (9361912560).

Almost surely, 2^203084398781 is an apocalyptic number.

It is an amenable number.

203084398781 is a deficient number, since it is larger than the sum of its proper divisors (21601502659).

203084398781 is a wasteful number, since it uses less digits than its factorization.

203084398781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12665 (or 12654 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 203084398781 in words is "two hundred three billion, eighty-four million, three hundred ninety-eight thousand, seven hundred eighty-one".