203042050861 has 16 divisors (see below), whose sum is σ = 222135241216. Its totient is φ = 184456331136.

The previous prime is 203042050801. The next prime is 203042050877. The reversal of 203042050861 is 168050240302.

It is a cyclic number.

It is not a de Polignac number, because 203042050861 - 2⁹ = 203042050349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203042050801) 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 15 ways as a sum of consecutive naturals, for example, 208336 + ... + 670438.

It is an arithmetic number, because the mean of its divisors is an integer number (13883452576).

Almost surely, 2^203042050861 is an apocalyptic number.

It is an amenable number.

203042050861 is a deficient number, since it is larger than the sum of its proper divisors (19093190355).

203042050861 is a wasteful number, since it uses less digits than its factorization.

203042050861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462652.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 203042050861 in words is "two hundred three billion, forty-two million, fifty thousand, eight hundred sixty-one".