20442391744 has 56 divisors (see below), whose sum is σ = 43679699280. Its totient is φ = 9456869376.

The previous prime is 20442391687. The next prime is 20442391747. The reversal of 20442391744 is 44719324402.

It is a junction number, because it is equal to n+sod(n) for n = 20442391697 and 20442391706.

It is not an unprimeable number, because it can be changed into a prime (20442391747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95037 + ... + 223420.

It is an arithmetic number, because the mean of its divisors is an integer number (779994630).

Almost surely, 2^20442391744 is an apocalyptic number.

It is an amenable number.

20442391744 is an abundant number, since it is smaller than the sum of its proper divisors (23237307536).

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

20442391744 is a wasteful number, since it uses less digits than its factorization.

20442391744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318545 (or 318535 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 20442391744 in words is "twenty billion, four hundred forty-two million, three hundred ninety-one thousand, seven hundred forty-four".