20503225943 has 4 divisors (see below), whose sum is σ = 20528508168. Its totient is φ = 20477943720.

The previous prime is 20503225927. The next prime is 20503225949. The reversal of 20503225943 is 34952230502.

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 20503225943 - 2⁴ = 20503225927 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 (20503225949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12639896 + ... + 12641517.

It is an arithmetic number, because the mean of its divisors is an integer number (5132127042).

Almost surely, 2^20503225943 is an apocalyptic number.

20503225943 is a deficient number, since it is larger than the sum of its proper divisors (25282225).

20503225943 is an equidigital number, since it uses as much as digits as its factorization.

20503225943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25282224.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 20503225943 in words is "twenty billion, five hundred three million, two hundred twenty-five thousand, nine hundred forty-three".