20001130993 has 4 divisors (see below), whose sum is σ = 20870745408. Its totient is φ = 19131516580.

The previous prime is 20001130949. The next prime is 20001130997. The reversal of 20001130993 is 39903110002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20001130993 - 2⁹ = 20001130481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001130997) 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, 434807173 + ... + 434807218.

It is an arithmetic number, because the mean of its divisors is an integer number (5217686352).

Almost surely, 2^20001130993 is an apocalyptic number.

20001130993 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20001130993 is a deficient number, since it is larger than the sum of its proper divisors (869614415).

20001130993 is an equidigital number, since it uses as much as digits as its factorization.

20001130993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869614414.

The product of its (nonzero) digits is 1458, while the sum is 28.

Adding to 20001130993 its reverse (39903110002), we get a palindrome (59904240995).

The spelling of 20001130993 in words is "twenty billion, one million, one hundred thirty thousand, nine hundred ninety-three".