20456211 has 4 divisors (see below), whose sum is σ = 27274952. Its totient is φ = 13637472.

The previous prime is 20456209. The next prime is 20456221. The reversal of 20456211 is 11265402.

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

It is not a de Polignac number, because 20456211 - 2¹ = 20456209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20456221) 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, 3409366 + ... + 3409371.

It is an arithmetic number, because the mean of its divisors is an integer number (6818738).

Almost surely, 2^20456211 is an apocalyptic number.

20456211 is a deficient number, since it is larger than the sum of its proper divisors (6818741).

20456211 is an equidigital number, since it uses as much as digits as its factorization.

20456211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818740.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20456211 is about 4522.8542978964. The cubic root of 20456211 is about 273.4901765246.

It can be divided in two parts, 2045 and 6211, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 20456211 in words is "twenty million, four hundred fifty-six thousand, two hundred eleven".