20203173543 has 8 divisors (see below), whose sum is σ = 30785788288. Its totient is φ = 11544670584.

The previous prime is 20203173539. The next prime is 20203173559. The reversal of 20203173543 is 34537130202.

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

It is not a de Polignac number, because 20203173543 - 2² = 20203173539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20203173543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203173503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481027921 + ... + 481027962.

It is an arithmetic number, because the mean of its divisors is an integer number (3848223536).

Almost surely, 2^20203173543 is an apocalyptic number.

20203173543 is a deficient number, since it is larger than the sum of its proper divisors (10582614745).

20203173543 is an equidigital number, since it uses as much as digits as its factorization.

20203173543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962055893.

The product of its (nonzero) digits is 15120, while the sum is 30.

The spelling of 20203173543 in words is "twenty billion, two hundred three million, one hundred seventy-three thousand, five hundred forty-three".