1820810011 has 8 divisors (see below), whose sum is σ = 1838493360. Its totient is φ = 1803144672.

The previous prime is 1820809967. The next prime is 1820810039. The reversal of 1820810011 is 1100180281.

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

It is a cyclic number.

It is not a de Polignac number, because 1820810011 - 2⁹ = 1820809499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820810051) 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 7 ways as a sum of consecutive naturals, for example, 290436 + ... + 296638.

It is an arithmetic number, because the mean of its divisors is an integer number (229811670).

Almost surely, 2^1820810011 is an apocalyptic number.

1820810011 is a deficient number, since it is larger than the sum of its proper divisors (17683349).

1820810011 is a wasteful number, since it uses less digits than its factorization.

1820810011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9005.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 1820810011 is about 42670.9504346927. The cubic root of 1820810011 is about 1221.1102521939.

Adding to 1820810011 its reverse (1100180281), we get a palindrome (2920990292).

The spelling of 1820810011 in words is "one billion, eight hundred twenty million, eight hundred ten thousand, eleven".