20421304341222 has 32 divisors (see below), whose sum is σ = 42256026021600. Its totient is φ = 6571588018688.

The previous prime is 20421304341199. The next prime is 20421304341247. The reversal of 20421304341222 is 22214340312402.

It is a self number, because there is not a number n which added to its sum of digits gives 20421304341222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5555613 + ... + 8468024.

It is an arithmetic number, because the mean of its divisors is an integer number (1320500813175).

Almost surely, 2^{20421304341222} is an apocalyptic number.

20421304341222 is an abundant number, since it is smaller than the sum of its proper divisors (21834721680378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20421304341222 is a wasteful number, since it uses less digits than its factorization.

20421304341222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14032040.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 20421304341222 its reverse (22214340312402), we get a palindrome (42635644653624).

The spelling of 20421304341222 in words is "twenty trillion, four hundred twenty-one billion, three hundred four million, three hundred forty-one thousand, two hundred twenty-two".