1820285101 has 6 divisors (see below), whose sum is σ = 1921132302. Its totient is φ = 1724480280.

The previous prime is 1820285099. The next prime is 1820285141. The reversal of 1820285101 is 1015820281.

It can be written as a sum of positive squares in only one way, i.e., 1182672100 + 637613001 = 34390^2 + 25251^2 .

It is not a de Polignac number, because 1820285101 - 2¹ = 1820285099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1820285101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820285141) 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 5 ways as a sum of consecutive naturals, for example, 2520810 + ... + 2521531.

It is an arithmetic number, because the mean of its divisors is an integer number (320188717).

Almost surely, 2^1820285101 is an apocalyptic number.

It is an amenable number.

1820285101 is a deficient number, since it is larger than the sum of its proper divisors (100847201).

1820285101 is an equidigital number, since it uses as much as digits as its factorization.

1820285101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5042379 (or 5042360 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 1820285101 is about 42664.7993198140. The cubic root of 1820285101 is about 1220.9928988214.

The spelling of 1820285101 in words is "one billion, eight hundred twenty million, two hundred eighty-five thousand, one hundred one".