20272211 has 4 divisors (see below), whose sum is σ = 21464712. Its totient is φ = 19079712.

The previous prime is 20272207. The next prime is 20272229. The reversal of 20272211 is 11227202.

20272211 = T₈₆₆ + T₈₆₇ + ... + T₉₁₆.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20272211 - 2² = 20272207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1192483 = 20272211 / (2 + 0 + 2 + 7 + 2 + 2 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20272211.

It is not an unprimeable number, because it can be changed into a prime (20272201) 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, 596225 + ... + 596258.

It is an arithmetic number, because the mean of its divisors is an integer number (5366178).

Almost surely, 2^20272211 is an apocalyptic number.

20272211 is a deficient number, since it is larger than the sum of its proper divisors (1192501).

20272211 is a wasteful number, since it uses less digits than its factorization.

20272211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192500.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20272211 is about 4502.4672125403. The cubic root of 20272211 is about 272.6677069947.

Adding to 20272211 its reverse (11227202), we get a palindrome (31499413).

The spelling of 20272211 in words is "twenty million, two hundred seventy-two thousand, two hundred eleven".