20657222 has 16 divisors (see below), whose sum is σ = 33091200. Its totient is φ = 9649920.

The previous prime is 20657209. The next prime is 20657233. The reversal of 20657222 is 22275602.

It is a junction number, because it is equal to n+sod(n) for n = 20657191 and 20657200.

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, 3947 + ... + 7542.

It is an arithmetic number, because the mean of its divisors is an integer number (2068200).

Almost surely, 2^20657222 is an apocalyptic number.

20657222 is a deficient number, since it is larger than the sum of its proper divisors (12433978).

20657222 is a wasteful number, since it uses less digits than its factorization.

20657222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11551.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20657222 is about 4545.0216721155. The cubic root of 20657222 is about 274.3830665969.

It can be divided in two parts, 20657 and 222, that multiplied together give a palindrome (4585854).

The spelling of 20657222 in words is "twenty million, six hundred fifty-seven thousand, two hundred twenty-two".