20343654420221 has 8 divisors (see below), whose sum is σ = 22193166993888. Its totient is φ = 18494156754000.

The previous prime is 20343654420143. The next prime is 20343654420241. The reversal of 20343654420221 is 12202445634302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20343654420221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343654420241) 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, 771575 + ... + 6425156.

It is an arithmetic number, because the mean of its divisors is an integer number (2774145874236).

Almost surely, 2^{20343654420221} is an apocalyptic number.

It is an amenable number.

20343654420221 is a deficient number, since it is larger than the sum of its proper divisors (1849512573667).

20343654420221 is a wasteful number, since it uses less digits than its factorization.

20343654420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7453723.

The product of its (nonzero) digits is 276480, while the sum is 38.

The spelling of 20343654420221 in words is "twenty trillion, three hundred forty-three billion, six hundred fifty-four million, four hundred twenty thousand, two hundred twenty-one".