20421353550414 has 16 divisors (see below), whose sum is σ = 40843246598352. Its totient is φ = 6807027933888.

The previous prime is 20421353550413. The next prime is 20421353550461. The reversal of 20421353550414 is 41405535312402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421353550413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21986149 + ... + 22896144.

It is an arithmetic number, because the mean of its divisors is an integer number (2552702912397).

Almost surely, 2^{20421353550414} is an apocalyptic number.

20421353550414 is an abundant number, since it is smaller than the sum of its proper divisors (20421893047938).

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

20421353550414 is a wasteful number, since it uses less digits than its factorization.

20421353550414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44958131.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 20421353550414 its reverse (41405535312402), we get a palindrome (61826888862816).

The spelling of 20421353550414 in words is "twenty trillion, four hundred twenty-one billion, three hundred fifty-three million, five hundred fifty thousand, four hundred fourteen".