20001255503 has 2 divisors, whose sum is σ = 20001255504. Its totient is φ = 20001255502.

The previous prime is 20001255481. The next prime is 20001255509. The reversal of 20001255503 is 30555210002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20001255503 - 2⁸ = 20001255247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001255509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000627751 + 10000627752.

It is an arithmetic number, because the mean of its divisors is an integer number (10000627752).

Almost surely, 2^20001255503 is an apocalyptic number.

20001255503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001255503 is an equidigital number, since it uses as much as digits as its factorization.

20001255503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 23.

Adding to 20001255503 its reverse (30555210002), we get a palindrome (50556465505).

The spelling of 20001255503 in words is "twenty billion, one million, two hundred fifty-five thousand, five hundred three".