20368005644 has 48 divisors (see below), whose sum is σ = 41408136000. Its totient is φ = 8586141696.

The previous prime is 20368005641. The next prime is 20368005653. The reversal of 20368005644 is 44650086302.

It is a junction number, because it is equal to n+sod(n) for n = 20368005598 and 20368005607.

It is not an unprimeable number, because it can be changed into a prime (20368005641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459782 + ... + 502130.

It is an arithmetic number, because the mean of its divisors is an integer number (862669500).

Almost surely, 2^20368005644 is an apocalyptic number.

It is an amenable number.

20368005644 is an abundant number, since it is smaller than the sum of its proper divisors (21040130356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20368005644 is a wasteful number, since it uses less digits than its factorization.

20368005644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42642 (or 42640 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 20368005644 in words is "twenty billion, three hundred sixty-eight million, five thousand, six hundred forty-four".