20211214 has 4 divisors (see below), whose sum is σ = 30316824. Its totient is φ = 10105606.

The previous prime is 20211209. The next prime is 20211221. The reversal of 20211214 is 41211202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41211202 = 2 ⋅20605601.

It is a junction number, because it is equal to n+sod(n) for n = 20211194 and 20211203.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5052802 + ... + 5052805.

It is an arithmetic number, because the mean of its divisors is an integer number (7579206).

Almost surely, 2^20211214 is an apocalyptic number.

20211214 is a deficient number, since it is larger than the sum of its proper divisors (10105610).

20211214 is a wasteful number, since it uses less digits than its factorization.

20211214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105609.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 20211214 is about 4495.6883788804. The cubic root of 20211214 is about 272.3939558763.

Adding to 20211214 its reverse (41211202), we get a palindrome (61422416).

The spelling of 20211214 in words is "twenty million, two hundred eleven thousand, two hundred fourteen".