20658426417 has 6 divisors (see below), whose sum is σ = 29839949282. Its totient is φ = 13772284272.

The previous prime is 20658426379. The next prime is 20658426479. The reversal of 20658426417 is 71462485602.

20658426417 is a `hidden beast` number, since 2 + 0 + 6 + 584 + 2 + 64 + 1 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15835957281 + 4822469136 = 125841^2 + 69444^2 .

It is not a de Polignac number, because 20658426417 - 2¹⁵ = 20658393649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20658426917) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1147690348 + ... + 1147690365.

Almost surely, 2^20658426417 is an apocalyptic number.

It is an amenable number.

20658426417 is a deficient number, since it is larger than the sum of its proper divisors (9181522865).

20658426417 is a wasteful number, since it uses less digits than its factorization.

20658426417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295380719 (or 2295380716 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 20658426417 in words is "twenty billion, six hundred fifty-eight million, four hundred twenty-six thousand, four hundred seventeen".