20365804418 has 8 divisors (see below), whose sum is σ = 30549494412. Its totient is φ = 10182639616.

The previous prime is 20365804387. The next prime is 20365804453. The reversal of 20365804418 is 81440856302.

It can be written as a sum of positive squares in 2 ways, for example, as 18759959089 + 1605845329 = 136967^2 + 40073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13055 + ... + 202242.

Almost surely, 2^20365804418 is an apocalyptic number.

20365804418 is a deficient number, since it is larger than the sum of its proper divisors (10183689994).

20365804418 is a wasteful number, since it uses less digits than its factorization.

20365804418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262596.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 20365804418 in words is "twenty billion, three hundred sixty-five million, eight hundred four thousand, four hundred eighteen".