20544303197 has 8 divisors (see below), whose sum is σ = 22746474912. Its totient is φ = 18397882800.

The previous prime is 20544303137. The next prime is 20544303233. The reversal of 20544303197 is 79130344502.

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

It is not a de Polignac number, because 20544303197 - 2¹⁰ = 20544302173 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 20544303197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544303137) 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, 13937054 + ... + 13938527.

It is an arithmetic number, because the mean of its divisors is an integer number (2843309364).

Almost surely, 2^20544303197 is an apocalyptic number.

It is an amenable number.

20544303197 is a deficient number, since it is larger than the sum of its proper divisors (2202171715).

20544303197 is a wasteful number, since it uses less digits than its factorization.

20544303197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27875659.

The product of its (nonzero) digits is 90720, while the sum is 38.

Adding to 20544303197 its reverse (79130344502), we get a palindrome (99674647699).

The spelling of 20544303197 in words is "twenty billion, five hundred forty-four million, three hundred three thousand, one hundred ninety-seven".