20224004 has 12 divisors (see below), whose sum is σ = 35790300. Its totient is φ = 9998208.

The previous prime is 20223989. The next prime is 20224007. The reversal of 20224004 is 40042202.

20224004 = 432² + 433² + ... + 520².

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1214404 + 19009600 = 1102^2 + 4360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20224004.

It is not an unprimeable number, because it can be changed into a prime (20224007) 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, 28049 + ... + 28760.

It is an arithmetic number, because the mean of its divisors is an integer number (2982525).

Almost surely, 2^20224004 is an apocalyptic number.

It is an amenable number.

20224004 is a deficient number, since it is larger than the sum of its proper divisors (15566296).

20224004 is a wasteful number, since it uses less digits than its factorization.

20224004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56902 (or 56900 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20224004 is about 4497.1106279477. The cubic root of 20224004 is about 272.4514022698.

Adding to 20224004 its reverse (40042202), we get a palindrome (60266206).

The spelling of 20224004 in words is "twenty million, two hundred twenty-four thousand, four".