20384422645 has 16 divisors (see below), whose sum is σ = 25957940400. Its totient is φ = 15314059264.

The previous prime is 20384422607. The next prime is 20384422717. The reversal of 20384422645 is 54622448302.

It can be written as a sum of positive squares in 8 ways, for example, as 7569 + 20384415076 = 87^2 + 142774^2 .

It is a cyclic number.

It is not a de Polignac number, because 20384422645 - 2³¹ = 18236938997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20384422598 and 20384422607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228892 + ... + 305221.

It is an arithmetic number, because the mean of its divisors is an integer number (1622371275).

Almost surely, 2^20384422645 is an apocalyptic number.

It is an amenable number.

20384422645 is a deficient number, since it is larger than the sum of its proper divisors (5573517755).

20384422645 is a wasteful number, since it uses less digits than its factorization.

20384422645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534584.

The product of its (nonzero) digits is 368640, while the sum is 40.

The spelling of 20384422645 in words is "twenty billion, three hundred eighty-four million, four hundred twenty-two thousand, six hundred forty-five".