20421542334514 has 16 divisors (see below), whose sum is σ = 32314485329280. Its totient is φ = 9652378718160.

The previous prime is 20421542334503. The next prime is 20421542334551. The reversal of 20421542334514 is 41543324512402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582855594 + ... + 582890629.

It is an arithmetic number, because the mean of its divisors is an integer number (2019655333080).

Almost surely, 2^{20421542334514} is an apocalyptic number.

20421542334514 is a deficient number, since it is larger than the sum of its proper divisors (11892942994766).

20421542334514 is a wasteful number, since it uses less digits than its factorization.

20421542334514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165746705.

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 20421542334514 its reverse (41543324512402), we get a palindrome (61964866846916).

The spelling of 20421542334514 in words is "twenty trillion, four hundred twenty-one billion, five hundred forty-two million, three hundred thirty-four thousand, five hundred fourteen".