20323211111 has 8 divisors (see below), whose sum is σ = 23343244800. Its totient is φ = 17332356888.

The previous prime is 20323211101. The next prime is 20323211137. The reversal of 20323211111 is 11111232302.

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

It is not a de Polignac number, because 20323211111 - 2¹⁰ = 20323210087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20323211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323211101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7293371 + ... + 7296156.

It is an arithmetic number, because the mean of its divisors is an integer number (2917905600).

Almost surely, 2^20323211111 is an apocalyptic number.

20323211111 is a deficient number, since it is larger than the sum of its proper divisors (3020033689).

20323211111 is a wasteful number, since it uses less digits than its factorization.

20323211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14589733.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20323211111 its reverse (11111232302), we get a palindrome (31434443413).

The spelling of 20323211111 in words is "twenty billion, three hundred twenty-three million, two hundred eleven thousand, one hundred eleven".