212020206140 has 48 divisors (see below), whose sum is σ = 456801629760. Its totient is φ = 82612677120.

The previous prime is 212020206121. The next prime is 212020206149. The reversal of 212020206140 is 41602020212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020206149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337481 + ... + 733439.

It is an arithmetic number, because the mean of its divisors is an integer number (9516700620).

Almost surely, 2^212020206140 is an apocalyptic number.

212020206140 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 212020206140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228400814880).

212020206140 is an abundant number, since it is smaller than the sum of its proper divisors (244781423620).

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

212020206140 is a wasteful number, since it uses less digits than its factorization.

212020206140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396662 (or 396660 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212020206140 its reverse (41602020212), we get a palindrome (253622226352).

The spelling of 212020206140 in words is "two hundred twelve billion, twenty million, two hundred six thousand, one hundred forty".