1820000002 has 8 divisors (see below), whose sum is σ = 2757030012. Its totient is φ = 900990000.

The previous prime is 1819999999. The next prime is 1820000003. The reversal of 1820000002 is 2000000281.

It can be written as a sum of positive squares in 2 ways, for example, as 1462374081 + 357625921 = 38241^2 + 18911^2 .

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 (1820000003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4504749 + ... + 4505152.

Almost surely, 2^1820000002 is an apocalyptic number.

1820000002 is a deficient number, since it is larger than the sum of its proper divisors (937030010).

1820000002 is a wasteful number, since it uses less digits than its factorization.

1820000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010004.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1820000002 is about 42661.4580388434. The cubic root of 1820000002 is about 1220.9291501940.

Adding to 1820000002 its reverse (2000000281), we get a palindrome (3820000283).

The spelling of 1820000002 in words is "one billion, eight hundred twenty million, two", and thus it is an aban number.