20142224 has 10 divisors (see below), whose sum is σ = 39025590. Its totient is φ = 10071104.

The previous prime is 20142209. The next prime is 20142247. The reversal of 20142224 is 42224102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 71824 = 4480^2 + 268^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629429 + ... + 629460.

It is an arithmetic number, because the mean of its divisors is an integer number (3902559).

Almost surely, 2^20142224 is an apocalyptic number.

It is an amenable number.

20142224 is a deficient number, since it is larger than the sum of its proper divisors (18883366).

20142224 is a wasteful number, since it uses less digits than its factorization.

20142224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258897 (or 1258891 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20142224 is about 4488.0089126471. The cubic root of 20142224 is about 272.0836680324.

Adding to 20142224 its reverse (42224102), we get a palindrome (62366326).

The spelling of 20142224 in words is "twenty million, one hundred forty-two thousand, two hundred twenty-four".