20228208404402 has 8 divisors (see below), whose sum is σ = 31388599248300. Its totient is φ = 9765341988304.

The previous prime is 20228208404389. The next prime is 20228208404441. The reversal of 20228208404402 is 20440480282202.

It can be written as a sum of positive squares in 2 ways, for example, as 20207731080601 + 20477323801 = 4495301^2 + 143099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174381106877 + ... + 174381106992.

Almost surely, 2^{20228208404402} is an apocalyptic number.

20228208404402 is a deficient number, since it is larger than the sum of its proper divisors (11160390843898).

20228208404402 is a wasteful number, since it uses less digits than its factorization.

20228208404402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348762213900.

The product of its (nonzero) digits is 131072, while the sum is 38.

Adding to 20228208404402 its reverse (20440480282202), we get a palindrome (40668688686604).

The spelling of 20228208404402 in words is "twenty trillion, two hundred twenty-eight billion, two hundred eight million, four hundred four thousand, four hundred two".