20973211 has 16 divisors (see below), whose sum is σ = 24558336. Its totient is φ = 17541216.

The previous prime is 20973179. The next prime is 20973229. The reversal of 20973211 is 11237902.

It is not a de Polignac number, because 20973211 - 2⁵ = 20973179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20973241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92280 + ... + 92506.

It is an arithmetic number, because the mean of its divisors is an integer number (1534896).

Almost surely, 2^20973211 is an apocalyptic number.

20973211 is a deficient number, since it is larger than the sum of its proper divisors (3585125).

20973211 is a wasteful number, since it uses less digits than its factorization.

20973211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 20973211 is about 4579.6518426623. The cubic root of 20973211 is about 275.7750521306.

The spelling of 20973211 in words is "twenty million, nine hundred seventy-three thousand, two hundred eleven".