203864900018 has 8 divisors (see below), whose sum is σ = 329320223148. Its totient is φ = 94091492304.

The previous prime is 203864899951. The next prime is 203864900021. The reversal of 203864900018 is 810009468302.

It can be written as a sum of positive squares in 2 ways, for example, as 197689612129 + 6175287889 = 444623^2 + 78583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3920478821 + ... + 3920478872.

Almost surely, 2^203864900018 is an apocalyptic number.

203864900018 is a deficient number, since it is larger than the sum of its proper divisors (125455323130).

203864900018 is a wasteful number, since it uses less digits than its factorization.

203864900018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7840957708.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 203864900018 in words is "two hundred three billion, eight hundred sixty-four million, nine hundred thousand, eighteen".