20227811 has 4 divisors (see below), whose sum is σ = 20352072. Its totient is φ = 20103552.

The previous prime is 20227747. The next prime is 20227817. The reversal of 20227811 is 11872202.

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

It is a cyclic number.

It is not a de Polignac number, because 20227811 - 2⁶ = 20227747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20227817) 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 3 ways as a sum of consecutive naturals, for example, 61886 + ... + 62211.

It is an arithmetic number, because the mean of its divisors is an integer number (5088018).

Almost surely, 2^20227811 is an apocalyptic number.

20227811 is a deficient number, since it is larger than the sum of its proper divisors (124261).

20227811 is a wasteful number, since it uses less digits than its factorization.

20227811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124260.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20227811 is about 4497.5338798057. The cubic root of 20227811 is about 272.4684967649.

The spelling of 20227811 in words is "twenty million, two hundred twenty-seven thousand, eight hundred eleven".