1818200022002 has 24 divisors (see below), whose sum is σ = 3416617626156. Its totient is φ = 719287920288.

The previous prime is 1818200021933. The next prime is 1818200022053. The reversal of 1818200022002 is 2002200028181.

It can be written as a sum of positive squares in 2 ways, for example, as 1810722788161 + 7477233841 = 1345631^2 + 86471^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 713578013 + ... + 713580560.

Almost surely, 2^{1818200022002} is an apocalyptic number.

1818200022002 is a deficient number, since it is larger than the sum of its proper divisors (1598417604154).

1818200022002 is a wasteful number, since it uses less digits than its factorization.

1818200022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427158602 (or 1427158595 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The spelling of 1818200022002 in words is "one trillion, eight hundred eighteen billion, two hundred million, twenty-two thousand, two".