20350222511 has 4 divisors (see below), whose sum is σ = 20350529592. Its totient is φ = 20349915432.

The previous prime is 20350222471. The next prime is 20350222523. The reversal of 20350222511 is 11522205302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20350222511 - 2³⁰ = 19276480687 is a prime.

It is a super-2 number, since 2×20350222511² (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 (20350222591) 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, 8405 + ... + 201918.

It is an arithmetic number, because the mean of its divisors is an integer number (5087632398).

Almost surely, 2^20350222511 is an apocalyptic number.

20350222511 is a deficient number, since it is larger than the sum of its proper divisors (307081).

20350222511 is an equidigital number, since it uses as much as digits as its factorization.

20350222511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307080.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20350222511 its reverse (11522205302), we get a palindrome (31872427813).

The spelling of 20350222511 in words is "twenty billion, three hundred fifty million, two hundred twenty-two thousand, five hundred eleven".