20572211 has 8 divisors (see below), whose sum is σ = 22534848. Its totient is φ = 18625000.

The previous prime is 20572199. The next prime is 20572213. The reversal of 20572211 is 11227502.

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

It is a cyclic number.

It is not a de Polignac number, because 20572211 - 2⁶ = 20572147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20572213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965 + ... + 6486.

It is an arithmetic number, because the mean of its divisors is an integer number (2816856).

Almost surely, 2^20572211 is an apocalyptic number.

20572211 is a deficient number, since it is larger than the sum of its proper divisors (1962637).

20572211 is a wasteful number, since it uses less digits than its factorization.

20572211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7713.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 20572211 is about 4535.6599299330. The cubic root of 20572211 is about 274.0061580657.

Adding to 20572211 its reverse (11227502), we get a palindrome (31799713).

The spelling of 20572211 in words is "twenty million, five hundred seventy-two thousand, two hundred eleven".