20420622245057 has 8 divisors (see below), whose sum is σ = 20451595590720. Its totient is φ = 20389664696560.

The previous prime is 20420622245053. The next prime is 20420622245147. The reversal of 20420622245057 is 75054222602402.

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 20420622245057 - 2² = 20420622245053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20420622245053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1360694 + ... + 6533967.

It is an arithmetic number, because the mean of its divisors is an integer number (2556449448840).

Almost surely, 2^{20420622245057} is an apocalyptic number.

It is an amenable number.

20420622245057 is a deficient number, since it is larger than the sum of its proper divisors (30973345663).

20420622245057 is an equidigital number, since it uses as much as digits as its factorization.

20420622245057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7898583.

The product of its (nonzero) digits is 537600, while the sum is 41.

Adding to 20420622245057 its reverse (75054222602402), we get a palindrome (95474844847459).

The spelling of 20420622245057 in words is "twenty trillion, four hundred twenty billion, six hundred twenty-two million, two hundred forty-five thousand, fifty-seven".