1820185103 has 8 divisors (see below), whose sum is σ = 2009581056. Its totient is φ = 1634776600.

The previous prime is 1820185093. The next prime is 1820185111. The reversal of 1820185103 is 3015810281.

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 1820185103 - 2²⁴ = 1803407887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820185163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995903 + ... + 997728.

It is an arithmetic number, because the mean of its divisors is an integer number (251197632).

Almost surely, 2^1820185103 is an apocalyptic number.

1820185103 is a deficient number, since it is larger than the sum of its proper divisors (189395953).

1820185103 is a wasteful number, since it uses less digits than its factorization.

1820185103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993725.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1820185103 is about 42663.6274008669. The cubic root of 1820185103 is about 1220.9705398543.

Adding to 1820185103 its reverse (3015810281), we get a palindrome (4835995384).

The spelling of 1820185103 in words is "one billion, eight hundred twenty million, one hundred eighty-five thousand, one hundred three".