21635304226244 has 12 divisors (see below), whose sum is σ = 37862155225104. Its totient is φ = 10817545590504.

The previous prime is 21635304226231. The next prime is 21635304226273. The reversal of 21635304226244 is 44262240353612.

It is a junction number, because it is equal to n+sod(n) for n = 21635304226195 and 21635304226204.

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, 26172794 + ... + 26986769.

It is an arithmetic number, because the mean of its divisors is an integer number (3155179602092).

Almost surely, 2^{21635304226244} is an apocalyptic number.

It is an amenable number.

21635304226244 is a deficient number, since it is larger than the sum of its proper divisors (16226850998860).

21635304226244 is a wasteful number, since it uses less digits than its factorization.

21635304226244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53261314 (or 53261312 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 44.

Adding to 21635304226244 its reverse (44262240353612), we get a palindrome (65897544579856).

The spelling of 21635304226244 in words is "twenty-one trillion, six hundred thirty-five billion, three hundred four million, two hundred twenty-six thousand, two hundred forty-four".