20940211 has 4 divisors (see below), whose sum is σ = 21091000. Its totient is φ = 20789424.

The previous prime is 20940203. The next prime is 20940251. The reversal of 20940211 is 11204902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11204902 = 2 ⋅5602451.

It is a cyclic number.

It is not a de Polignac number, because 20940211 - 2³ = 20940203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20940251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75186 + ... + 75463.

It is an arithmetic number, because the mean of its divisors is an integer number (5272750).

Almost surely, 2^20940211 is an apocalyptic number.

20940211 is a deficient number, since it is larger than the sum of its proper divisors (150789).

20940211 is a wasteful number, since it uses less digits than its factorization.

20940211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150788.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 20940211 is about 4576.0475303476. The cubic root of 20940211 is about 275.6303380959.

The spelling of 20940211 in words is "twenty million, nine hundred forty thousand, two hundred eleven".