20427244 has 12 divisors (see below), whose sum is σ = 35801584. Its totient is φ = 10198224.

The previous prime is 20427241. The next prime is 20427247. The reversal of 20427244 is 44272402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20427241) and next prime (20427247).

It is not an unprimeable number, because it can be changed into a prime (20427241) 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, 552 + ... + 6415.

Almost surely, 2^20427244 is an apocalyptic number.

It is an amenable number.

20427244 is a deficient number, since it is larger than the sum of its proper divisors (15374340).

20427244 is a wasteful number, since it uses less digits than its factorization.

20427244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7704 (or 7702 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 20427244 is about 4519.6508714723. The cubic root of 20427244 is about 273.3610237001.

Adding to 20427244 its reverse (44272402), we get a palindrome (64699646).

The spelling of 20427244 in words is "twenty million, four hundred twenty-seven thousand, two hundred forty-four".