20963228 has 48 divisors (see below), whose sum is σ = 43822464. Its totient is φ = 8648640.

The previous prime is 20963219. The next prime is 20963273. The reversal of 20963228 is 82236902.

It is a junction number, because it is equal to n+sod(n) for n = 20963194 and 20963203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38051 + ... + 38597.

It is an arithmetic number, because the mean of its divisors is an integer number (912968).

Almost surely, 2^20963228 is an apocalyptic number.

It is an amenable number.

20963228 is an abundant number, since it is smaller than the sum of its proper divisors (22859236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20963228 is a wasteful number, since it uses less digits than its factorization.

20963228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20963228 is about 4578.5617829183. The cubic root of 20963228 is about 275.7312899671.

The spelling of 20963228 in words is "twenty million, nine hundred sixty-three thousand, two hundred twenty-eight".