1800018180002 has 20 divisors (see below), whose sum is σ = 3149844399606. Its totient is φ = 771436360800.

The previous prime is 1800018179989. The next prime is 1800018180047. The reversal of 1800018180002 is 2000818100081.

It can be written as a sum of positive squares in only one way, i.e., 1781715066481 + 18303113521 = 1334809^2 + 135289^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 187418999 + ... + 187428602.

Almost surely, 2^{1800018180002} is an apocalyptic number.

1800018180002 is a deficient number, since it is larger than the sum of its proper divisors (1349826219604).

1800018180002 is an frugal number, since it uses more digits than its factorization.

1800018180002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374847631 (or 374847610 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 29.

The spelling of 1800018180002 in words is "one trillion, eight hundred billion, eighteen million, one hundred eighty thousand, two".