211404342320 has 20 divisors (see below), whose sum is σ = 491515096080. Its totient is φ = 84561736896.

The previous prime is 211404342269. The next prime is 211404342349. The reversal of 211404342320 is 23243404112.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 211404342320.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321277060 + ... + 1321277219.

It is an arithmetic number, because the mean of its divisors is an integer number (24575754804).

Almost surely, 2^211404342320 is an apocalyptic number.

211404342320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211404342320 is an abundant number, since it is smaller than the sum of its proper divisors (280110753760).

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

211404342320 is a wasteful number, since it uses less digits than its factorization.

211404342320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642554292 (or 2642554286 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 211404342320 its reverse (23243404112), we get a palindrome (234647746432).

The spelling of 211404342320 in words is "two hundred eleven billion, four hundred four million, three hundred forty-two thousand, three hundred twenty".