20474227 has 4 divisors (see below), whose sum is σ = 20492320. Its totient is φ = 20456136.

The previous prime is 20474221. The next prime is 20474249. The reversal of 20474227 is 72247402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72247402 = 2 ⋅36123701.

It is a cyclic number.

It is not a de Polignac number, because 20474227 - 2¹⁹ = 19949939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20474195 and 20474204.

It is not an unprimeable number, because it can be changed into a prime (20474221) 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, 7227 + ... + 9652.

It is an arithmetic number, because the mean of its divisors is an integer number (5123080).

Almost surely, 2^20474227 is an apocalyptic number.

20474227 is a deficient number, since it is larger than the sum of its proper divisors (18093).

20474227 is a wasteful number, since it uses less digits than its factorization.

20474227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18092.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 20474227 is about 4524.8455222250. The cubic root of 20474227 is about 273.5704415234.

The spelling of 20474227 in words is "twenty million, four hundred seventy-four thousand, two hundred twenty-seven".