20000166847 has 2 divisors, whose sum is σ = 20000166848. Its totient is φ = 20000166846.

The previous prime is 20000166793. The next prime is 20000166869. The reversal of 20000166847 is 74866100002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20000166847 - 2¹¹ = 20000164799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000136847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000083423 + 10000083424.

It is an arithmetic number, because the mean of its divisors is an integer number (10000083424).

Almost surely, 2^20000166847 is an apocalyptic number.

20000166847 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000166847 is an equidigital number, since it uses as much as digits as its factorization.

20000166847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

Adding to 20000166847 its reverse (74866100002), we get a palindrome (94866266849).

The spelling of 20000166847 in words is "twenty billion, one hundred sixty-six thousand, eight hundred forty-seven".