212443664620 has 96 divisors (see below), whose sum is σ = 502940503296. Its totient is φ = 74708256000.

The previous prime is 212443664617. The next prime is 212443664701. The reversal of 212443664620 is 26466344212.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 844287 + ... + 1066633.

It is an arithmetic number, because the mean of its divisors is an integer number (5238963576).

Almost surely, 2^212443664620 is an apocalyptic number.

212443664620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212443664620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251470251648).

212443664620 is an abundant number, since it is smaller than the sum of its proper divisors (290496838676).

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

212443664620 is a wasteful number, since it uses less digits than its factorization.

212443664620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222511 (or 222509 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 212443664620 in words is "two hundred twelve billion, four hundred forty-three million, six hundred sixty-four thousand, six hundred twenty".