1820868833 has 8 divisors (see below), whose sum is σ = 2091557952. Its totient is φ = 1552820976.

The previous prime is 1820868817. The next prime is 1820868839. The reversal of 1820868833 is 3388680281.

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

It is not a de Polignac number, because 1820868833 - 2⁴ = 1820868817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1820868839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658835 + ... + 661592.

It is an arithmetic number, because the mean of its divisors is an integer number (261444744).

Almost surely, 2^1820868833 is an apocalyptic number.

It is an amenable number.

1820868833 is a deficient number, since it is larger than the sum of its proper divisors (270689119).

1820868833 is a wasteful number, since it uses less digits than its factorization.

1820868833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320631.

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 1820868833 is about 42671.6396802373. The cubic root of 1820868833 is about 1221.1234015383.

The spelling of 1820868833 in words is "one billion, eight hundred twenty million, eight hundred sixty-eight thousand, eight hundred thirty-three".