21641200382 has 8 divisors (see below), whose sum is σ = 32852906856. Its totient is φ = 10690231432.

The previous prime is 21641200367. The next prime is 21641200429. The reversal of 21641200382 is 28300214612.

It is a happy number.

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, 65184173 + ... + 65184504.

It is an arithmetic number, because the mean of its divisors is an integer number (4106613357).

Almost surely, 2^21641200382 is an apocalyptic number.

21641200382 is a deficient number, since it is larger than the sum of its proper divisors (11211706474).

21641200382 is a wasteful number, since it uses less digits than its factorization.

21641200382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130368762.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 21641200382 its reverse (28300214612), we get a palindrome (49941414994).

The spelling of 21641200382 in words is "twenty-one billion, six hundred forty-one million, two hundred thousand, three hundred eighty-two".