1821183195474 has 40 divisors (see below), whose sum is σ = 4082430654720. Its totient is φ = 606818396664.

The previous prime is 1821183195463. The next prime is 1821183195521. The reversal of 1821183195474 is 4745913811281.

1821183195474 is a `hidden beast` number, since 1 + 8 + 2 + 1 + 1 + 83 + 1 + 95 + 474 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1821183195474.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1840194 + ... + 2651165.

It is an arithmetic number, because the mean of its divisors is an integer number (102060766368).

Almost surely, 2^{1821183195474} is an apocalyptic number.

1821183195474 is an abundant number, since it is smaller than the sum of its proper divisors (2261247459246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1821183195474 is a wasteful number, since it uses less digits than its factorization.

1821183195474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493876 (or 4493867 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 1821183195474 in words is "one trillion, eight hundred twenty-one billion, one hundred eighty-three million, one hundred ninety-five thousand, four hundred seventy-four".