20344651633646 has 32 divisors (see below), whose sum is σ = 31503113801280. Its totient is φ = 9846451673856.

The previous prime is 20344651633627. The next prime is 20344651633679. The reversal of 20344651633646 is 64633615644302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244271066 + ... + 244354338.

It is an arithmetic number, because the mean of its divisors is an integer number (984472306290).

Almost surely, 2^{20344651633646} is an apocalyptic number.

20344651633646 is a deficient number, since it is larger than the sum of its proper divisors (11158462167634).

20344651633646 is a wasteful number, since it uses less digits than its factorization.

20344651633646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100268.

The product of its (nonzero) digits is 22394880, while the sum is 53.

The spelling of 20344651633646 in words is "twenty trillion, three hundred forty-four billion, six hundred fifty-one million, six hundred thirty-three thousand, six hundred forty-six".