1838211001 has 4 divisors (see below), whose sum is σ = 2005321104. Its totient is φ = 1671100900.

The previous prime is 1838210987. The next prime is 1838211007. The reversal of 1838211001 is 1001128381.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1001128381 = 11 ⋅91011671.

It is a cyclic number.

It is not a de Polignac number, because 1838211001 - 2⁷ = 1838210873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1838211007) by changing a digit.

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, 83555035 + ... + 83555056.

It is an arithmetic number, because the mean of its divisors is an integer number (501330276).

Almost surely, 2^1838211001 is an apocalyptic number.

1838211001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1838211001 is a deficient number, since it is larger than the sum of its proper divisors (167110103).

1838211001 is a wasteful number, since it uses less digits than its factorization.

1838211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167110102.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 1838211001 is about 42874.3629806905. The cubic root of 1838211001 is about 1224.9878662688.

Adding to 1838211001 its reverse (1001128381), we get a palindrome (2839339382).

The spelling of 1838211001 in words is "one billion, eight hundred thirty-eight million, two hundred eleven thousand, one".