20001052191 has 8 divisors (see below), whose sum is σ = 26787658240. Its totient is φ = 13274240472.

The previous prime is 20001052171. The next prime is 20001052193. The reversal of 20001052191 is 19125010002.

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

It is not a de Polignac number, because 20001052191 - 2¹³ = 20001043999 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 (20001052193) 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, 14947801 + ... + 14949138.

It is an arithmetic number, because the mean of its divisors is an integer number (3348457280).

Almost surely, 2^20001052191 is an apocalyptic number.

20001052191 is a deficient number, since it is larger than the sum of its proper divisors (6786606049).

20001052191 is a wasteful number, since it uses less digits than its factorization.

20001052191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29897165.

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 20001052191 its reverse (19125010002), we get a palindrome (39126062193).

The spelling of 20001052191 in words is "twenty billion, one million, fifty-two thousand, one hundred ninety-one".