20275228 has 6 divisors (see below), whose sum is σ = 35481656. Its totient is φ = 10137612.

The previous prime is 20275219. The next prime is 20275247. The reversal of 20275228 is 82257202.

It is a super-2 number, since 2×20275228² = 822169740903968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20275196 and 20275205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2534400 + ... + 2534407.

Almost surely, 2^20275228 is an apocalyptic number.

It is an amenable number.

20275228 is a deficient number, since it is larger than the sum of its proper divisors (15206428).

20275228 is a wasteful number, since it uses less digits than its factorization.

20275228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068811 (or 5068809 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20275228 is about 4502.8022386065. The cubic root of 20275228 is about 272.6812328613.

It can be divided in two parts, 20275 and 228, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20275228 in words is "twenty million, two hundred seventy-five thousand, two hundred twenty-eight".