20206111701 has 4 divisors (see below), whose sum is σ = 26941482272. Its totient is φ = 13470741132.

The previous prime is 20206111691. The next prime is 20206111721. The reversal of 20206111701 is 10711160202.

It is a happy number.

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 not a de Polignac number, because 20206111701 - 2⁵ = 20206111669 is a prime.

It is a super-2 number, since 2×20206111701² (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 (20206111721) 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, 3367685281 + ... + 3367685286.

It is an arithmetic number, because the mean of its divisors is an integer number (6735370568).

Almost surely, 2^20206111701 is an apocalyptic number.

It is an amenable number.

20206111701 is a deficient number, since it is larger than the sum of its proper divisors (6735370571).

20206111701 is an equidigital number, since it uses as much as digits as its factorization.

20206111701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735370570.

The product of its (nonzero) digits is 168, while the sum is 21.

Adding to 20206111701 its reverse (10711160202), we get a palindrome (30917271903).

The spelling of 20206111701 in words is "twenty billion, two hundred six million, one hundred eleven thousand, seven hundred one".