10020811993 has 4 divisors (see below), whose sum is σ = 10610271540. Its totient is φ = 9431352448.

The previous prime is 10020811973. The next prime is 10020812033. The reversal of 10020811993 is 39911802001.

10020811993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39911802001 = 661 ⋅60380941.

It can be written as a sum of positive squares in 2 ways, for example, as 5362339984 + 4658472009 = 73228^2 + 68253^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020811993 - 2²¹ = 10018714841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10020811903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294729748 + ... + 294729781.

It is an arithmetic number, because the mean of its divisors is an integer number (2652567885).

Almost surely, 2^10020811993 is an apocalyptic number.

It is an amenable number.

10020811993 is a deficient number, since it is larger than the sum of its proper divisors (589459547).

10020811993 is an equidigital number, since it uses as much as digits as its factorization.

10020811993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589459546.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 10020811993 in words is "ten billion, twenty million, eight hundred eleven thousand, nine hundred ninety-three".