1820209382 has 16 divisors (see below), whose sum is σ = 2742876432. Its totient is φ = 905926560.

The previous prime is 1820209379. The next prime is 1820209403. The reversal of 1820209382 is 2839020281.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509948 + ... + 513504.

It is an arithmetic number, because the mean of its divisors is an integer number (171429777).

Almost surely, 2^1820209382 is an apocalyptic number.

1820209382 is a deficient number, since it is larger than the sum of its proper divisors (922667050).

1820209382 is a wasteful number, since it uses less digits than its factorization.

1820209382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1820209382 is about 42663.9119397179. The cubic root of 1820209382 is about 1220.9759685718.

The spelling of 1820209382 in words is "one billion, eight hundred twenty million, two hundred nine thousand, three hundred eighty-two".