20355102323644 has 24 divisors (see below), whose sum is σ = 38869586517888. Its totient is φ = 9249975019440.

The previous prime is 20355102323639. The next prime is 20355102323713. The reversal of 20355102323644 is 44632320155302.

It is a junction number, because it is equal to n+sod(n) for n = 20355102323597 and 20355102323606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58429824 + ... + 58777159.

It is an arithmetic number, because the mean of its divisors is an integer number (1619566104912).

Almost surely, 2^{20355102323644} is an apocalyptic number.

It is an amenable number.

20355102323644 is a deficient number, since it is larger than the sum of its proper divisors (18514484194244).

20355102323644 is a wasteful number, since it uses less digits than its factorization.

20355102323644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117210945 (or 117210943 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 20355102323644 its reverse (44632320155302), we get a palindrome (64987422478946).

The spelling of 20355102323644 in words is "twenty trillion, three hundred fifty-five billion, one hundred two million, three hundred twenty-three thousand, six hundred forty-four".