20412431435221 has 8 divisors (see below), whose sum is σ = 23485060137600. Its totient is φ = 17378944500048.

The previous prime is 20412431435167. The next prime is 20412431435273. The reversal of 20412431435221 is 12253413421402.

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

It is a cyclic number.

It is not a de Polignac number, because 20412431435221 - 2¹⁵ = 20412431402453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412431435021) 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, 9785440681 + ... + 9785442766.

It is an arithmetic number, because the mean of its divisors is an integer number (2935632517200).

Almost surely, 2^{20412431435221} is an apocalyptic number.

It is an amenable number.

20412431435221 is a deficient number, since it is larger than the sum of its proper divisors (3072628702379).

20412431435221 is a wasteful number, since it uses less digits than its factorization.

20412431435221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19570883603.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 20412431435221 its reverse (12253413421402), we get a palindrome (32665844856623).

The spelling of 20412431435221 in words is "twenty trillion, four hundred twelve billion, four hundred thirty-one million, four hundred thirty-five thousand, two hundred twenty-one".