8205620424421 has 8 divisors (see below), whose sum is σ = 9377894811584. Its totient is φ = 7033356761760.

The previous prime is 8205620424403. The next prime is 8205620424427. The reversal of 8205620424421 is 1244240265028.

It is a happy number.

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

It is not a de Polignac number, because 8205620424421 - 2⁷ = 8205620424293 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 (8205620424427) 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, 968640 + ... + 4165273.

It is an arithmetic number, because the mean of its divisors is an integer number (1172236851448).

Almost surely, 2^{8205620424421} is an apocalyptic number.

It is an amenable number.

8205620424421 is a deficient number, since it is larger than the sum of its proper divisors (1172274387163).

8205620424421 is a wasteful number, since it uses less digits than its factorization.

8205620424421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362251.

The product of its (nonzero) digits is 245760, while the sum is 40.

Adding to 8205620424421 its reverse (1244240265028), we get a palindrome (9449860689449).

The spelling of 8205620424421 in words is "eight trillion, two hundred five billion, six hundred twenty million, four hundred twenty-four thousand, four hundred twenty-one".