20954228 has 12 divisors (see below), whose sum is σ = 36863232. Its totient is φ = 10421880.

The previous prime is 20954209. The next prime is 20954243. The reversal of 20954228 is 82245902.

It is a junction number, because it is equal to n+sod(n) for n = 20954194 and 20954203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12950 + ... + 14477.

It is an arithmetic number, because the mean of its divisors is an integer number (3071936).

Almost surely, 2^20954228 is an apocalyptic number.

It is an amenable number.

20954228 is a deficient number, since it is larger than the sum of its proper divisors (15909004).

20954228 is a wasteful number, since it uses less digits than its factorization.

20954228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27622 (or 27620 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20954228 is about 4577.5788360224. The cubic root of 20954228 is about 275.6918250394.

The spelling of 20954228 in words is "twenty million, nine hundred fifty-four thousand, two hundred twenty-eight".