20954223 has 12 divisors (see below), whose sum is σ = 30321720. Its totient is φ = 13944336.

The previous prime is 20954209. The next prime is 20954243. The reversal of 20954223 is 32245902.

It is not a de Polignac number, because 20954223 - 2⁵ = 20954191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20954243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4165 + ... + 7697.

It is an arithmetic number, because the mean of its divisors is an integer number (2526810).

Almost surely, 2^20954223 is an apocalyptic number.

20954223 is a deficient number, since it is larger than the sum of its proper divisors (9367497).

20954223 is a wasteful number, since it uses less digits than its factorization.

20954223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198 (or 4195 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20954223 is about 4577.5782898821. The cubic root of 20954223 is about 275.6918031113.

The spelling of 20954223 in words is "twenty million, nine hundred fifty-four thousand, two hundred twenty-three".