20023450197 has 8 divisors (see below), whose sum is σ = 26707558656. Its totient is φ = 13344154272.

The previous prime is 20023450169. The next prime is 20023450201. The reversal of 20023450197 is 79105432002.

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

It is not a de Polignac number, because 20023450197 - 2¹² = 20023446101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023450127) 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, 1193413 + ... + 1210074.

It is an arithmetic number, because the mean of its divisors is an integer number (3338444832).

Almost surely, 2^20023450197 is an apocalyptic number.

It is an amenable number.

20023450197 is a deficient number, since it is larger than the sum of its proper divisors (6684108459).

20023450197 is a wasteful number, since it uses less digits than its factorization.

20023450197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406267.

The product of its (nonzero) digits is 15120, while the sum is 33.

Adding to 20023450197 its reverse (79105432002), we get a palindrome (99128882199).

The spelling of 20023450197 in words is "twenty billion, twenty-three million, four hundred fifty thousand, one hundred ninety-seven".