20476228 has 18 divisors (see below), whose sum is σ = 38067386. Its totient is φ = 9635328.

The previous prime is 20476219. The next prime is 20476241. The reversal of 20476228 is 82267402.

It can be written as a sum of positive squares in 3 ways, for example, as 13601344 + 6874884 = 3688^2 + 2622^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20476228.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7701 + ... + 10012.

Almost surely, 2^20476228 is an apocalyptic number.

It is an amenable number.

20476228 is a deficient number, since it is larger than the sum of its proper divisors (17591158).

20476228 is a wasteful number, since it uses less digits than its factorization.

20476228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17751 (or 17732 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20476228 is about 4525.0666293437. The cubic root of 20476228 is about 273.5793534857.

The spelling of 20476228 in words is "twenty million, four hundred seventy-six thousand, two hundred twenty-eight".