1819100001 has 4 divisors (see below), whose sum is σ = 2425466672. Its totient is φ = 1212733332.

The previous prime is 1819099999. The next prime is 1819100021. The reversal of 1819100001 is 1000019181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1819100001 - 2¹ = 1819099999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1819100021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303183331 + ... + 303183336.

It is an arithmetic number, because the mean of its divisors is an integer number (606366668).

Almost surely, 2^1819100001 is an apocalyptic number.

It is an amenable number.

1819100001 is a deficient number, since it is larger than the sum of its proper divisors (606366671).

1819100001 is an equidigital number, since it uses as much as digits as its factorization.

1819100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606366670.

The product of its (nonzero) digits is 72, while the sum is 21.

The square root of 1819100001 is about 42650.9085600764. The cubic root of 1819100001 is about 1220.7278647303.

Adding to 1819100001 its reverse (1000019181), we get a palindrome (2819119182).

The spelling of 1819100001 in words is "one billion, eight hundred nineteen million, one hundred thousand, one".