20421434410312 has 16 divisors (see below), whose sum is σ = 41235588713340. Its totient is φ = 9425277420096.

The previous prime is 20421434410301. The next prime is 20421434410331. The reversal of 20421434410312 is 21301443412402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20409559077636 + 11875332676 = 4517694^2 + 108974^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98179973023 + ... + 98179973230.

Almost surely, 2^{20421434410312} is an apocalyptic number.

It is an amenable number.

20421434410312 is an abundant number, since it is smaller than the sum of its proper divisors (20814154303028).

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

20421434410312 is a wasteful number, since it uses less digits than its factorization.

20421434410312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196359946272 (or 196359946268 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 20421434410312 its reverse (21301443412402), we get a palindrome (41722877822714).

The spelling of 20421434410312 in words is "twenty trillion, four hundred twenty-one billion, four hundred thirty-four million, four hundred ten thousand, three hundred twelve".