1820200394 has 8 divisors (see below), whose sum is σ = 2735151840. Its totient is φ = 908483116.

The previous prime is 1820200391. The next prime is 1820200397. The reversal of 1820200394 is 4930020281.

It is an interprime number because it is at equal distance from previous prime (1820200391) and next prime (1820200397).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1820200391) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 807134 + ... + 809385.

It is an arithmetic number, because the mean of its divisors is an integer number (341893980).

Almost surely, 2^1820200394 is an apocalyptic number.

1820200394 is a deficient number, since it is larger than the sum of its proper divisors (914951446).

1820200394 is a wasteful number, since it uses less digits than its factorization.

1820200394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617084.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1820200394 is about 42663.8066046620. The cubic root of 1820200394 is about 1220.9739588854.

The spelling of 1820200394 in words is "one billion, eight hundred twenty million, two hundred thousand, three hundred ninety-four".