20634222 has 32 divisors (see below), whose sum is σ = 48172032. Its totient is φ = 5769504.

The previous prime is 20634221. The next prime is 20634241. The reversal of 20634222 is 22243602.

It is a super-2 number, since 2×20634222² = 851542235090568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20634221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3253 + ... + 7200.

It is an arithmetic number, because the mean of its divisors is an integer number (1505376).

Almost surely, 2^20634222 is an apocalyptic number.

20634222 is an abundant number, since it is smaller than the sum of its proper divisors (27537810).

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

20634222 is a wasteful number, since it uses less digits than its factorization.

20634222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10512.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 20634222 is about 4542.4907264627. The cubic root of 20634222 is about 274.2811949745.

Adding to 20634222 its reverse (22243602), we get a palindrome (42877824).

The spelling of 20634222 in words is "twenty million, six hundred thirty-four thousand, two hundred twenty-two".