20503502143 has 8 divisors (see below), whose sum is σ = 20914897248. Its totient is φ = 20093015904.

The previous prime is 20503502119. The next prime is 20503502147. The reversal of 20503502143 is 34120530502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20503502143 - 2³³ = 11913567551 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 (20503502147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181555 + ... + 271972.

It is an arithmetic number, because the mean of its divisors is an integer number (2614362156).

Almost surely, 2^20503502143 is an apocalyptic number.

20503502143 is a deficient number, since it is larger than the sum of its proper divisors (411395105).

20503502143 is an equidigital number, since it uses as much as digits as its factorization.

20503502143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454433.

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 20503502143 in words is "twenty billion, five hundred three million, five hundred two thousand, one hundred forty-three".