20204223442 has 24 divisors (see below), whose sum is σ = 32929083684. Its totient is φ = 9293154624.

The previous prime is 20204223437. The next prime is 20204223443. The reversal of 20204223442 is 24432240202.

It can be written as a sum of positive squares in 6 ways, for example, as 11517797041 + 8686426401 = 107321^2 + 93201^2 .

It is not an unprimeable number, because it can be changed into a prime (20204223443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2973 + ... + 201040.

Almost surely, 2^20204223442 is an apocalyptic number.

20204223442 is a deficient number, since it is larger than the sum of its proper divisors (12724860242).

20204223442 is a wasteful number, since it uses less digits than its factorization.

20204223442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204334 (or 204321 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 20204223442 its reverse (24432240202), we get a palindrome (44636463644).

The spelling of 20204223442 in words is "twenty billion, two hundred four million, two hundred twenty-three thousand, four hundred forty-two".