20105006 has 8 divisors (see below), whose sum is σ = 30893184. Its totient is φ = 9807280.

The previous prime is 20104993. The next prime is 20105009. The reversal of 20105006 is 60050102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20105006² = 808422532520072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105009) 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 3 ways as a sum of consecutive naturals, for example, 122510 + ... + 122673.

It is an arithmetic number, because the mean of its divisors is an integer number (3861648).

Almost surely, 2^20105006 is an apocalyptic number.

20105006 is a deficient number, since it is larger than the sum of its proper divisors (10788178).

20105006 is a wasteful number, since it uses less digits than its factorization.

20105006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245226.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20105006 is about 4483.8606133554. The cubic root of 20105006 is about 271.9159829177.

Adding to 20105006 its reverse (60050102), we get a palindrome (80155108).

The spelling of 20105006 in words is "twenty million, one hundred five thousand, six".