20524421503 has 4 divisors (see below), whose sum is σ = 21186499648. Its totient is φ = 19862343360.

The previous prime is 20524421497. The next prime is 20524421513. The reversal of 20524421503 is 30512442502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20524421503 - 2⁹ = 20524420991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20524421513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331039026 + ... + 331039087.

It is an arithmetic number, because the mean of its divisors is an integer number (5296624912).

Almost surely, 2^20524421503 is an apocalyptic number.

20524421503 is a deficient number, since it is larger than the sum of its proper divisors (662078145).

20524421503 is an equidigital number, since it uses as much as digits as its factorization.

20524421503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662078144.

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 20524421503 in words is "twenty billion, five hundred twenty-four million, four hundred twenty-one thousand, five hundred three".