20344618891984 has 80 divisors (see below), whose sum is σ = 39669854716800. Its totient is φ = 10107487272960.

The previous prime is 20344618891969. The next prime is 20344618891991. The reversal of 20344618891984 is 48919881644302.

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, 2913446157 + ... + 2913453139.

It is an arithmetic number, because the mean of its divisors is an integer number (495873183960).

Almost surely, 2^{20344618891984} is an apocalyptic number.

It is an amenable number.

20344618891984 is a deficient number, since it is larger than the sum of its proper divisors (19325235824816).

20344618891984 is a wasteful number, since it uses less digits than its factorization.

20344618891984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9068 (or 9062 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 67.

The spelling of 20344618891984 in words is "twenty trillion, three hundred forty-four billion, six hundred eighteen million, eight hundred ninety-one thousand, nine hundred eighty-four".