1819336473 has 6 divisors (see below), whose sum is σ = 2627930474. Its totient is φ = 1212890976.

The previous prime is 1819336471. The next prime is 1819336513. The reversal of 1819336473 is 3746339181.

It can be written as a sum of positive squares in only one way, i.e., 1663660944 + 155675529 = 40788^2 + 12477^2 .

It is not a de Polignac number, because 1819336473 - 2¹ = 1819336471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1819336471) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 101074240 + ... + 101074257.

Almost surely, 2^1819336473 is an apocalyptic number.

It is an amenable number.

1819336473 is a deficient number, since it is larger than the sum of its proper divisors (808594001).

1819336473 is a wasteful number, since it uses less digits than its factorization.

1819336473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202148503 (or 202148500 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1819336473 is about 42653.6806500916. The cubic root of 1819336473 is about 1220.7807581853.

The spelling of 1819336473 in words is "one billion, eight hundred nineteen million, three hundred thirty-six thousand, four hundred seventy-three".