20623244 has 12 divisors (see below), whose sum is σ = 38213784. Its totient is φ = 9705024.

The previous prime is 20623243. The next prime is 20623247. The reversal of 20623244 is 44232602.

It is not an unprimeable number, because it can be changed into a prime (20623241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151574 + ... + 151709.

It is an arithmetic number, because the mean of its divisors is an integer number (3184482).

Almost surely, 2^20623244 is an apocalyptic number.

It is an amenable number.

20623244 is a deficient number, since it is larger than the sum of its proper divisors (17590540).

20623244 is a wasteful number, since it uses less digits than its factorization.

20623244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303304 (or 303302 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 20623244 is about 4541.2821977939. The cubic root of 20623244 is about 274.2325445156.

Adding to 20623244 its reverse (44232602), we get a palindrome (64855846).

The spelling of 20623244 in words is "twenty million, six hundred twenty-three thousand, two hundred forty-four".