1821371418995 has 16 divisors (see below), whose sum is σ = 2329744744800. Its totient is φ = 1362181599744.

The previous prime is 1821371418953. The next prime is 1821371419009. The reversal of 1821371418995 is 5998141731281.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1821371418995 - 2⁶ = 1821371418931 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71893037 + ... + 71918366.

It is an arithmetic number, because the mean of its divisors is an integer number (145609046550).

Almost surely, 2^{1821371418995} is an apocalyptic number.

1821371418995 is a deficient number, since it is larger than the sum of its proper divisors (508373325805).

1821371418995 is a wasteful number, since it uses less digits than its factorization.

1821371418995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143811574.

The product of its digits is 4354560, while the sum is 59.

The spelling of 1821371418995 in words is "one trillion, eight hundred twenty-one billion, three hundred seventy-one million, four hundred eighteen thousand, nine hundred ninety-five".