20011007 has 2 divisors, whose sum is σ = 20011008. Its totient is φ = 20011006.

The previous prime is 20011001. The next prime is 20011031. The reversal of 20011007 is 70011002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011007 - 2²⁰ = 18962431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011001) 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 as a sum of consecutive naturals, namely, 10005503 + 10005504.

It is an arithmetic number, because the mean of its divisors is an integer number (10005504).

Almost surely, 2^20011007 is an apocalyptic number.

20011007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011007 is an equidigital number, since it uses as much as digits as its factorization.

20011007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14, while the sum is 11.

The square root of 20011007 is about 4473.3664057396. The cubic root of 20011007 is about 271.4915485184.

Adding to 20011007 its reverse (70011002), we get a palindrome (90022009).

The spelling of 20011007 in words is "twenty million, eleven thousand, seven".