1821471074273 has 2 divisors, whose sum is σ = 1821471074274. Its totient is φ = 1821471074272.

The previous prime is 1821471074239. The next prime is 1821471074317. The reversal of 1821471074273 is 3724701741281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1739990513569 + 81480560704 = 1319087^2 + 285448^2 .

It is a cyclic number.

It is not a de Polignac number, because 1821471074273 - 2¹⁰ = 1821471073249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1821471074233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910735537136 + 910735537137.

It is an arithmetic number, because the mean of its divisors is an integer number (910735537137).

Almost surely, 2^{1821471074273} is an apocalyptic number.

It is an amenable number.

1821471074273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821471074273 is an equidigital number, since it uses as much as digits as its factorization.

1821471074273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 1821471074273 in words is "one trillion, eight hundred twenty-one billion, four hundred seventy-one million, seventy-four thousand, two hundred seventy-three".