20005442503 has 2 divisors, whose sum is σ = 20005442504. Its totient is φ = 20005442502.

The previous prime is 20005442477. The next prime is 20005442539. The reversal of 20005442503 is 30524450002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20005442503 - 2¹³ = 20005434311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20005442003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002721251 + 10002721252.

It is an arithmetic number, because the mean of its divisors is an integer number (10002721252).

Almost surely, 2^20005442503 is an apocalyptic number.

20005442503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20005442503 is an equidigital number, since it uses as much as digits as its factorization.

20005442503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 20005442503 its reverse (30524450002), we get a palindrome (50529892505).

The spelling of 20005442503 in words is "twenty billion, five million, four hundred forty-two thousand, five hundred three".