210205204340 has 48 divisors (see below), whose sum is σ = 471765736512. Its totient is φ = 78396473856.

The previous prime is 210205204337. The next prime is 210205204361. The reversal of 210205204340 is 43402502012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2852642 + ... + 2925401.

It is an arithmetic number, because the mean of its divisors is an integer number (9828452844).

Almost surely, 2^210205204340 is an apocalyptic number.

210205204340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210205204340 is an abundant number, since it is smaller than the sum of its proper divisors (261560532172).

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

210205204340 is a wasteful number, since it uses less digits than its factorization.

210205204340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5778176 (or 5778174 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 210205204340 its reverse (43402502012), we get a palindrome (253607706352).

The spelling of 210205204340 in words is "two hundred ten billion, two hundred five million, two hundred four thousand, three hundred forty".