20375228 has 12 divisors (see below), whose sum is σ = 35807520. Its totient is φ = 10144512.

The previous prime is 20375227. The next prime is 20375269. The reversal of 20375228 is 82257302.

It is a self number, because there is not a number n which added to its sum of digits gives 20375228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20375221) 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, 9701 + ... + 11612.

It is an arithmetic number, because the mean of its divisors is an integer number (2983960).

Almost surely, 2^20375228 is an apocalyptic number.

It is an amenable number.

20375228 is a deficient number, since it is larger than the sum of its proper divisors (15432292).

20375228 is a wasteful number, since it uses less digits than its factorization.

20375228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21556 (or 21554 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20375228 is about 4513.8927767505. The cubic root of 20375228 is about 273.1287973436.

The spelling of 20375228 in words is "twenty million, three hundred seventy-five thousand, two hundred twenty-eight".