20445132503 has 2 divisors, whose sum is σ = 20445132504. Its totient is φ = 20445132502.

The previous prime is 20445132413. The next prime is 20445132511. The reversal of 20445132503 is 30523154402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20445132503 - 2⁸ = 20445132247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20445132563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222566251 + 10222566252.

It is an arithmetic number, because the mean of its divisors is an integer number (10222566252).

Almost surely, 2^20445132503 is an apocalyptic number.

20445132503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20445132503 is an equidigital number, since it uses as much as digits as its factorization.

20445132503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20445132503 its reverse (30523154402), we get a palindrome (50968286905).

The spelling of 20445132503 in words is "twenty billion, four hundred forty-five million, one hundred thirty-two thousand, five hundred three".