20825222 has 16 divisors (see below), whose sum is σ = 34383312. Its totient is φ = 9381120.

The previous prime is 20825209. The next prime is 20825227. The reversal of 20825222 is 22252802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1703 + ... + 6674.

It is an arithmetic number, because the mean of its divisors is an integer number (2148957).

Almost surely, 2^20825222 is an apocalyptic number.

20825222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20825222 is a deficient number, since it is larger than the sum of its proper divisors (13558090).

20825222 is a wasteful number, since it uses less digits than its factorization.

20825222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8503.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 20825222 is about 4563.4660073238. The cubic root of 20825222 is about 275.1248887289.

The spelling of 20825222 in words is "twenty million, eight hundred twenty-five thousand, two hundred twenty-two".