212093820 has 144 divisors (see below), whose sum is σ = 682456320. Its totient is φ = 53222400.

The previous prime is 212093803. The next prime is 212093821. The reversal of 212093820 is 28390212.

It is a happy number.

212093820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212093821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213525 + ... + 214515.

It is an arithmetic number, because the mean of its divisors is an integer number (4739280).

Almost surely, 2^212093820 is an apocalyptic number.

212093820 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 212093820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341228160).

212093820 is an abundant number, since it is smaller than the sum of its proper divisors (470362500).

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

212093820 is a wasteful number, since it uses less digits than its factorization.

212093820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 212093820 is about 14563.4412142186. The cubic root of 212093820 is about 596.3611424739.

The spelling of 212093820 in words is "two hundred twelve million, ninety-three thousand, eight hundred twenty".