20421324435201 has 8 divisors (see below), whose sum is σ = 27228453454944. Its totient is φ = 13614205852800.

The previous prime is 20421324435181. The next prime is 20421324435221. The reversal of 20421324435201 is 10253442312402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20421324435181) and next prime (20421324435221).

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

It is not a de Polignac number, because 20421324435201 - 2⁶ = 20421324435137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20421324435221) 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, 6387070 + ... + 9035336.

It is an arithmetic number, because the mean of its divisors is an integer number (3403556681868).

Almost surely, 2^{20421324435201} is an apocalyptic number.

It is an amenable number.

20421324435201 is a deficient number, since it is larger than the sum of its proper divisors (6807129019743).

20421324435201 is a wasteful number, since it uses less digits than its factorization.

20421324435201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218671.

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 20421324435201 its reverse (10253442312402), we get a palindrome (30674766747603).

The spelling of 20421324435201 in words is "twenty trillion, four hundred twenty-one billion, three hundred twenty-four million, four hundred thirty-five thousand, two hundred one".