20420404345053 has 8 divisors (see below), whose sum is σ = 30252450881600. Its totient is φ = 13613602896684.

The previous prime is 20420404344983. The next prime is 20420404345067. The reversal of 20420404345053 is 35054340402402.

20420404345053 is a `hidden beast` number, since 204 + 2 + 0 + 404 + 3 + 45 + 0 + 5 + 3 = 666.

It is not a de Polignac number, because 20420404345053 - 2⁹ = 20420404344541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20420404344999 and 20420404345017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420404345153) 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, 378155635993 + ... + 378155636046.

It is an arithmetic number, because the mean of its divisors is an integer number (3781556360200).

Almost surely, 2^{20420404345053} is an apocalyptic number.

It is an amenable number.

20420404345053 is a deficient number, since it is larger than the sum of its proper divisors (9832046536547).

20420404345053 is an equidigital number, since it uses as much as digits as its factorization.

20420404345053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756311272048 (or 756311272042 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 36.

Adding to 20420404345053 its reverse (35054340402402), we get a palindrome (55474744747455).

The spelling of 20420404345053 in words is "twenty trillion, four hundred twenty billion, four hundred four million, three hundred forty-five thousand, fifty-three".