20670222 has 16 divisors (see below), whose sum is σ = 41500800. Its totient is φ = 6863352.

The previous prime is 20670217. The next prime is 20670241. The reversal of 20670222 is 22207602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4972 + ... + 8127.

It is an arithmetic number, because the mean of its divisors is an integer number (2593800).

Almost surely, 2^20670222 is an apocalyptic number.

20670222 is an abundant number, since it is smaller than the sum of its proper divisors (20830578).

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

20670222 is a wasteful number, since it uses less digits than its factorization.

20670222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13367.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20670222 is about 4546.4515833780. The cubic root of 20670222 is about 274.4406127644.

Adding to 20670222 its reverse (22207602), we get a palindrome (42877824).

The spelling of 20670222 in words is "twenty million, six hundred seventy thousand, two hundred twenty-two".