20505284366 has 32 divisors (see below), whose sum is σ = 38420324352. Its totient is φ = 8004228480.

The previous prime is 20505284357. The next prime is 20505284413. The reversal of 20505284366 is 66348250502.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1382246 + ... + 1397001.

It is an arithmetic number, because the mean of its divisors is an integer number (1200635136).

Almost surely, 2^20505284366 is an apocalyptic number.

20505284366 is a deficient number, since it is larger than the sum of its proper divisors (17915039986).

20505284366 is a wasteful number, since it uses less digits than its factorization.

20505284366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779304.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 20505284366 in words is "twenty billion, five hundred five million, two hundred eighty-four thousand, three hundred sixty-six".