200031920018 has 18 divisors (see below), whose sum is σ = 349043014791. Its totient is φ = 85726068204.

The previous prime is 200031920009. The next prime is 200031920021. The reversal of 200031920018 is 810029130002.

It can be written as a sum of positive squares in only one way, i.e., 100015960009 + 100015960009 = 316253^2 + 316253^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=316253.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4404953 + ... + 4450131.

Almost surely, 2^200031920018 is an apocalyptic number.

200031920018 is a deficient number, since it is larger than the sum of its proper divisors (149011094773).

200031920018 is an frugal number, since it uses more digits than its factorization.

200031920018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90374 (or 45188 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 200031920018 in words is "two hundred billion, thirty-one million, nine hundred twenty thousand, eighteen".