20354324550503 has 2 divisors, whose sum is σ = 20354324550504. Its totient is φ = 20354324550502.

The previous prime is 20354324550493. The next prime is 20354324550517. The reversal of 20354324550503 is 30505542345302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20354324550503 - 2³⁰ = 20353250808679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20354324520503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177162275251 + 10177162275252.

It is an arithmetic number, because the mean of its divisors is an integer number (10177162275252).

Almost surely, 2^{20354324550503} is an apocalyptic number.

20354324550503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354324550503 is an equidigital number, since it uses as much as digits as its factorization.

20354324550503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080000, while the sum is 41.

Adding to 20354324550503 its reverse (30505542345302), we get a palindrome (50859866895805).

The spelling of 20354324550503 in words is "twenty trillion, three hundred fifty-four billion, three hundred twenty-four million, five hundred fifty thousand, five hundred three".