1820212000 has 48 divisors (see below), whose sum is σ = 4472270712. Its totient is φ = 728083200.

The previous prime is 1820211997. The next prime is 1820212013. The reversal of 1820212000 is 2120281.

It can be written as a sum of positive squares in 4 ways, for example, as 631617424 + 1188594576 = 25132^2 + 34476^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223527 + ... + 231526.

Almost surely, 2^1820212000 is an apocalyptic number.

1820212000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1820212000 is an abundant number, since it is smaller than the sum of its proper divisors (2652058712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1820212000 is an equidigital number, since it uses as much as digits as its factorization.

1820212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455078 (or 455060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1820212000 is about 42663.9426213753. The cubic root of 1820212000 is about 1220.9765539465.

Adding to 1820212000 its reverse (2120281), we get a palindrome (1822332281).

The spelling of 1820212000 in words is "one billion, eight hundred twenty million, two hundred twelve thousand".