20101347 has 12 divisors (see below), whose sum is σ = 33183280. Its totient is φ = 11486448.

The previous prime is 20101331. The next prime is 20101349. The reversal of 20101347 is 74310102.

It is not a de Polignac number, because 20101347 - 2⁴ = 20101331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159472 + ... + 159597.

Almost surely, 2^20101347 is an apocalyptic number.

20101347 is a deficient number, since it is larger than the sum of its proper divisors (13081933).

20101347 is a wasteful number, since it uses less digits than its factorization.

20101347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319082 (or 319079 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20101347 is about 4483.4525758616. The cubic root of 20101347 is about 271.8994861814.

Adding to 20101347 its reverse (74310102), we get a palindrome (94411449).

The spelling of 20101347 in words is "twenty million, one hundred one thousand, three hundred forty-seven".