20605677275 has 6 divisors (see below), whose sum is σ = 25551039852. Its totient is φ = 16484541800.

The previous prime is 20605677247. The next prime is 20605677317. The reversal of 20605677275 is 57277650602.

It is not a de Polignac number, because 20605677275 - 2⁸ = 20605677019 is a prime.

It is a super-2 number, since 2×20605677275² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 412113521 + ... + 412113570.

It is an arithmetic number, because the mean of its divisors is an integer number (4258506642).

Almost surely, 2^20605677275 is an apocalyptic number.

20605677275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20605677275 is a deficient number, since it is larger than the sum of its proper divisors (4945362577).

20605677275 is an equidigital number, since it uses as much as digits as its factorization.

20605677275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824227101 (or 824227096 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 47.

The spelling of 20605677275 in words is "twenty billion, six hundred five million, six hundred seventy-seven thousand, two hundred seventy-five".