20211207 has 8 divisors (see below), whose sum is σ = 26972400. Its totient is φ = 13462080.

The previous prime is 20211203. The next prime is 20211209. The reversal of 20211207 is 70211202.

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

It is not a de Polignac number, because 20211207 - 2² = 20211203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2169 + ... + 6717.

It is an arithmetic number, because the mean of its divisors is an integer number (3371550).

Almost surely, 2^20211207 is an apocalyptic number.

20211207 is a deficient number, since it is larger than the sum of its proper divisors (6761193).

20211207 is a wasteful number, since it uses less digits than its factorization.

20211207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 20211207 is about 4495.6876003566. The cubic root of 20211207 is about 272.3939244291.

Adding to 20211207 its reverse (70211202), we get a palindrome (90422409).

The spelling of 20211207 in words is "twenty million, two hundred eleven thousand, two hundred seven".