20544641444 has 12 divisors (see below), whose sum is σ = 36227574768. Its totient is φ = 10193905800.

The previous prime is 20544641431. The next prime is 20544641471. The reversal of 20544641444 is 44414644502.

It is a junction number, because it is equal to n+sod(n) for n = 20544641398 and 20544641407.

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, 19603142 + ... + 19604189.

It is an arithmetic number, because the mean of its divisors is an integer number (3018964564).

Almost surely, 2^20544641444 is an apocalyptic number.

It is an amenable number.

20544641444 is a deficient number, since it is larger than the sum of its proper divisors (15682933324).

20544641444 is a wasteful number, since it uses less digits than its factorization.

20544641444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39207466 (or 39207464 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 38.

The spelling of 20544641444 in words is "twenty billion, five hundred forty-four million, six hundred forty-one thousand, four hundred forty-four".