1820008873 has 16 divisors (see below), whose sum is σ = 1901824000. Its totient is φ = 1740128832.

The previous prime is 1820008859. The next prime is 1820008891. The reversal of 1820008873 is 3788000281.

It is a cyclic number.

It is not a de Polignac number, because 1820008873 - 2²⁵ = 1786454441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820008823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668008 + ... + 670726.

It is an arithmetic number, because the mean of its divisors is an integer number (118864000).

Almost surely, 2^1820008873 is an apocalyptic number.

It is an amenable number.

1820008873 is a deficient number, since it is larger than the sum of its proper divisors (81815127).

1820008873 is a wasteful number, since it uses less digits than its factorization.

1820008873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 1820008873 is about 42661.5620084403. The cubic root of 1820008873 is about 1220.9311338652.

The spelling of 1820008873 in words is "one billion, eight hundred twenty million, eight thousand, eight hundred seventy-three".