21641202205334 has 16 divisors (see below), whose sum is σ = 34170538273200. Its totient is φ = 10251030081024.

The previous prime is 21641202205237. The next prime is 21641202205373. The reversal of 21641202205334 is 43350220214612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21641202205294 and 21641202205303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4463462 + ... + 7950150.

It is an arithmetic number, because the mean of its divisors is an integer number (2135658642075).

Almost surely, 2^{21641202205334} is an apocalyptic number.

21641202205334 is a deficient number, since it is larger than the sum of its proper divisors (12529336067866).

21641202205334 is a wasteful number, since it uses less digits than its factorization.

21641202205334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3650047.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 21641202205334 its reverse (43350220214612), we get a palindrome (64991422419946).

The spelling of 21641202205334 in words is "twenty-one trillion, six hundred forty-one billion, two hundred two million, two hundred five thousand, three hundred thirty-four".