1813503946 has 8 divisors (see below), whose sum is σ = 2721075840. Its totient is φ = 906478668.

The previous prime is 1813503911. The next prime is 1813503971. The reversal of 1813503946 is 6493053181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1813503899 and 1813503908.

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 3 ways as a sum of consecutive naturals, for example, 128256 + ... + 141691.

It is an arithmetic number, because the mean of its divisors is an integer number (340134480).

Almost surely, 2^1813503946 is an apocalyptic number.

1813503946 is a deficient number, since it is larger than the sum of its proper divisors (907571894).

1813503946 is a wasteful number, since it uses less digits than its factorization.

1813503946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273308.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 1813503946 is about 42585.2550303506. The cubic root of 1813503946 is about 1219.4748133656.

The spelling of 1813503946 in words is "one billion, eight hundred thirteen million, five hundred three thousand, nine hundred forty-six".