20478227 has 12 divisors (see below), whose sum is σ = 25987896. Its totient is φ = 15956640.

The previous prime is 20478223. The next prime is 20478239. The reversal of 20478227 is 72287402.

It is a happy number.

It is not a de Polignac number, because 20478227 - 2² = 20478223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20478193 and 20478202.

It is not an unprimeable number, because it can be changed into a prime (20478223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18458 + ... + 19535.

It is an arithmetic number, because the mean of its divisors is an integer number (2165658).

Almost surely, 2^20478227 is an apocalyptic number.

20478227 is a deficient number, since it is larger than the sum of its proper divisors (5509669).

20478227 is a wasteful number, since it uses less digits than its factorization.

20478227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38018 (or 38011 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 20478227 is about 4525.2875046786. The cubic root of 20478227 is about 273.5882559609.

The spelling of 20478227 in words is "twenty million, four hundred seventy-eight thousand, two hundred twenty-seven".