20201020511 has 8 divisors (see below), whose sum is σ = 23152285344. Its totient is φ = 17266106880.

The previous prime is 20201020429. The next prime is 20201020577. The reversal of 20201020511 is 11502010202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201020511 is a prime.

It is a super-2 number, since 2×20201020511² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201020811) 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 7 ways as a sum of consecutive naturals, for example, 4085150 + ... + 4090091.

It is an arithmetic number, because the mean of its divisors is an integer number (2894035668).

Almost surely, 2^20201020511 is an apocalyptic number.

20201020511 is a deficient number, since it is larger than the sum of its proper divisors (2951264833).

20201020511 is an equidigital number, since it uses as much as digits as its factorization.

20201020511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8175601.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 20201020511 its reverse (11502010202), we get a palindrome (31703030713).

The spelling of 20201020511 in words is "twenty billion, two hundred one million, twenty thousand, five hundred eleven".