20042224 has 10 divisors (see below), whose sum is σ = 38831840. Its totient is φ = 10021104.

The previous prime is 20042173. The next prime is 20042249. The reversal of 20042224 is 42224002.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 1252639 = 20042224 / (2 + 0 + 0 + 4 + 2 + 2 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 20042198 and 20042207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626304 + ... + 626335.

It is an arithmetic number, because the mean of its divisors is an integer number (3883184).

Almost surely, 2^20042224 is an apocalyptic number.

It is an amenable number.

20042224 is a deficient number, since it is larger than the sum of its proper divisors (18789616).

20042224 is a wasteful number, since it uses less digits than its factorization.

20042224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252647 (or 1252641 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20042224 is about 4476.8542527091. The cubic root of 20042224 is about 271.6326500037.

Adding to 20042224 its reverse (42224002), we get a palindrome (62266226).

It can be divided in two parts, 200 and 42224, that added together give a palindrome (42424).

The spelling of 20042224 in words is "twenty million, forty-two thousand, two hundred twenty-four".