21205341622 has 8 divisors (see below), whose sum is σ = 31808678616. Its totient is φ = 10602448752.

The previous prime is 21205341613. The next prime is 21205341673. The reversal of 21205341622 is 22614350212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 62713 + ... + 215275.

It is an arithmetic number, because the mean of its divisors is an integer number (3976084827).

Almost surely, 2^21205341622 is an apocalyptic number.

21205341622 is a deficient number, since it is larger than the sum of its proper divisors (10603336994).

21205341622 is a wasteful number, since it uses less digits than its factorization.

21205341622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222062.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21205341622 its reverse (22614350212), we get a palindrome (43819691834).

The spelling of 21205341622 in words is "twenty-one billion, two hundred five million, three hundred forty-one thousand, six hundred twenty-two".