20466777305 has 16 divisors (see below), whose sum is σ = 26453879760. Its totient is φ = 15111353088.

The previous prime is 20466777281. The next prime is 20466777319. The reversal of 20466777305 is 50377766402.

It can be written as a sum of positive squares in 8 ways, for example, as 4391580361 + 16075196944 = 66269^2 + 126788^2 .

It is not a de Polignac number, because 20466777305 - 2⁸ = 20466777049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20466777305.

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, 412619 + ... + 459551.

It is an arithmetic number, because the mean of its divisors is an integer number (1653367485).

Almost surely, 2^20466777305 is an apocalyptic number.

It is an amenable number.

20466777305 is a deficient number, since it is larger than the sum of its proper divisors (5987102455).

20466777305 is a wasteful number, since it uses less digits than its factorization.

20466777305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53660.

The product of its (nonzero) digits is 1481760, while the sum is 47.

The spelling of 20466777305 in words is "twenty billion, four hundred sixty-six million, seven hundred seventy-seven thousand, three hundred five".