20189019203 has 4 divisors (see below), whose sum is σ = 20317611840. Its totient is φ = 20060426568.

The previous prime is 20189019199. The next prime is 20189019229. The reversal of 20189019203 is 30291098102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30291098102 = 2 ⋅15145549051.

It is a cyclic number.

It is not a de Polignac number, because 20189019203 - 2² = 20189019199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20189016203) 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, 64296083 + ... + 64296396.

It is an arithmetic number, because the mean of its divisors is an integer number (5079402960).

Almost surely, 2^20189019203 is an apocalyptic number.

20189019203 is a deficient number, since it is larger than the sum of its proper divisors (128592637).

20189019203 is a wasteful number, since it uses less digits than its factorization.

20189019203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128592636.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 20189019203 in words is "twenty billion, one hundred eighty-nine million, nineteen thousand, two hundred three".