1818181820002 has 32 divisors (see below), whose sum is σ = 2786494316400. Its totient is φ = 889555258368.

The previous prime is 1818181819991. The next prime is 1818181820029. The reversal of 1818181820002 is 2000281818181.

It can be written as a sum of positive squares in 8 ways, for example, as 1309928319441 + 508253500561 = 1144521^2 + 712919^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34156824 + ... + 34210012.

Almost surely, 2^{1818181820002} is an apocalyptic number.

1818181820002 is a deficient number, since it is larger than the sum of its proper divisors (968312496398).

1818181820002 is a wasteful number, since it uses less digits than its factorization.

1818181820002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55110.

The product of its (nonzero) digits is 16384, while the sum is 40.

The spelling of 1818181820002 in words is "one trillion, eight hundred eighteen billion, one hundred eighty-one million, eight hundred twenty thousand, two".