212300020 has 24 divisors (see below), whose sum is σ = 450430344. Its totient is φ = 84043776.

The previous prime is 212299991. The next prime is 212300021. The reversal of 212300020 is 20003212.

It can be written as a sum of positive squares in 4 ways, for example, as 59629284 + 152670736 = 7722^2 + 12356^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212300021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52777 + ... + 56656.

It is an arithmetic number, because the mean of its divisors is an integer number (18767931).

Almost surely, 2^212300020 is an apocalyptic number.

212300020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212300020 is an abundant number, since it is smaller than the sum of its proper divisors (238130324).

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

212300020 is a wasteful number, since it uses less digits than its factorization.

212300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109539 (or 109537 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 212300020 is about 14570.5188651606. The cubic root of 212300020 is about 596.5543428828.

Adding to 212300020 its reverse (20003212), we get a palindrome (232303232).

The spelling of 212300020 in words is "two hundred twelve million, three hundred thousand, twenty".