20123323011 has 48 divisors (see below), whose sum is σ = 33598551168. Its totient is φ = 11470406400.

The previous prime is 20123323009. The next prime is 20123323013. The reversal of 20123323011 is 11032332102.

20123323011 is a `hidden beast` number, since 20 + 12 + 332 + 301 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (20123323009) and next prime (20123323013).

It is not a de Polignac number, because 20123323011 - 2¹ = 20123323009 is a prime.

It is a super-2 number, since 2×20123323011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20123323013) 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 47 ways as a sum of consecutive naturals, for example, 3004176 + ... + 3010866.

It is an arithmetic number, because the mean of its divisors is an integer number (699969816).

Almost surely, 2^20123323011 is an apocalyptic number.

20123323011 is a deficient number, since it is larger than the sum of its proper divisors (13475228157).

20123323011 is a wasteful number, since it uses less digits than its factorization.

20123323011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8512 (or 8509 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20123323011 its reverse (11032332102), we get a palindrome (31155655113).

Subtracting from 20123323011 its reverse (11032332102), we obtain a palindrome (9090990909).

The spelling of 20123323011 in words is "twenty billion, one hundred twenty-three million, three hundred twenty-three thousand, eleven".