1820285102 has 4 divisors (see below), whose sum is σ = 2730427656. Its totient is φ = 910142550.

The previous prime is 1820285099. The next prime is 1820285141. The reversal of 1820285102 is 2015820281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2015820281 = 2351 ⋅857431.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 455071274 + ... + 455071277.

It is an arithmetic number, because the mean of its divisors is an integer number (682606914).

Almost surely, 2^1820285102 is an apocalyptic number.

1820285102 is a deficient number, since it is larger than the sum of its proper divisors (910142554).

1820285102 is an equidigital number, since it uses as much as digits as its factorization.

1820285102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910142553.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 1820285102 is about 42664.7993315332. The cubic root of 1820285102 is about 1220.9928990450.

The spelling of 1820285102 in words is "one billion, eight hundred twenty million, two hundred eighty-five thousand, one hundred two".