20355211011 has 8 divisors (see below), whose sum is σ = 27512066320. Its totient is φ = 13384248192.

The previous prime is 20355210989. The next prime is 20355211027. The reversal of 20355211011 is 11011255302.

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

It is not a de Polignac number, because 20355211011 - 2⁶ = 20355210947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20355211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46472866 + ... + 46473303.

It is an arithmetic number, because the mean of its divisors is an integer number (3439008290).

Almost surely, 2^20355211011 is an apocalyptic number.

20355211011 is a deficient number, since it is larger than the sum of its proper divisors (7156855309).

20355211011 is an equidigital number, since it uses as much as digits as its factorization.

20355211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92946245.

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 20355211011 its reverse (11011255302), we get a palindrome (31366466313).

The spelling of 20355211011 in words is "twenty billion, three hundred fifty-five million, two hundred eleven thousand, eleven".