20562224 has 10 divisors (see below), whose sum is σ = 39839340. Its totient is φ = 10281104.

The previous prime is 20562221. The next prime is 20562229. The reversal of 20562224 is 42226502.

It is a self number, because there is not a number n which added to its sum of digits gives 20562224.

It is not an unprimeable number, because it can be changed into a prime (20562221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642554 + ... + 642585.

It is an arithmetic number, because the mean of its divisors is an integer number (3983934).

Almost surely, 2^20562224 is an apocalyptic number.

It is an amenable number.

20562224 is a deficient number, since it is larger than the sum of its proper divisors (19277116).

20562224 is a wasteful number, since it uses less digits than its factorization.

20562224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285147 (or 1285141 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20562224 is about 4534.5588539570. The cubic root of 20562224 is about 273.9618111481.

Adding to 20562224 its reverse (42226502), we get a palindrome (62788726).

The spelling of 20562224 in words is "twenty million, five hundred sixty-two thousand, two hundred twenty-four".