20023241111 has 4 divisors (see below), whose sum is σ = 20024885400. Its totient is φ = 20021596824.

The previous prime is 20023241089. The next prime is 20023241167. The reversal of 20023241111 is 11114232002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20023241111 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 20023241111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023241191) 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 3 ways as a sum of consecutive naturals, for example, 803741 + ... + 828278.

It is an arithmetic number, because the mean of its divisors is an integer number (5006221350).

Almost surely, 2^20023241111 is an apocalyptic number.

20023241111 is a deficient number, since it is larger than the sum of its proper divisors (1644289).

20023241111 is a wasteful number, since it uses less digits than its factorization.

20023241111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644288.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20023241111 its reverse (11114232002), we get a palindrome (31137473113).

The spelling of 20023241111 in words is "twenty billion, twenty-three million, two hundred forty-one thousand, one hundred eleven".