20646226 has 16 divisors (see below), whose sum is σ = 32558400. Its totient is φ = 9800208.

The previous prime is 20646221. The next prime is 20646233. The reversal of 20646226 is 62264602.

It is a junction number, because it is equal to n+sod(n) for n = 20646194 and 20646203.

It is not an unprimeable number, because it can be changed into a prime (20646221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4780 + ... + 8008.

It is an arithmetic number, because the mean of its divisors is an integer number (2034900).

Almost surely, 2^20646226 is an apocalyptic number.

20646226 is a deficient number, since it is larger than the sum of its proper divisors (11912174).

20646226 is a wasteful number, since it uses less digits than its factorization.

20646226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20646226 is about 4543.8118358929. The cubic root of 20646226 is about 274.3343725421.

The spelling of 20646226 in words is "twenty million, six hundred forty-six thousand, two hundred twenty-six".