20012323311 has 48 divisors (see below), whose sum is σ = 30541056000. Its totient is φ = 12612003264.

The previous prime is 20012323187. The next prime is 20012323399. The reversal of 20012323311 is 11332321002.

20012323311 is a `hidden beast` number, since 20 + 0 + 12 + 323 + 311 = 666.

It is not a de Polignac number, because 20012323311 - 2⁷ = 20012323183 is a prime.

It is a super-3 number, since 3×20012323311³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012323411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2170890 + ... + 2180088.

It is an arithmetic number, because the mean of its divisors is an integer number (636272000).

Almost surely, 2^20012323311 is an apocalyptic number.

20012323311 is a deficient number, since it is larger than the sum of its proper divisors (10528732689).

20012323311 is a wasteful number, since it uses less digits than its factorization.

20012323311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9428 (or 9425 counting only the distinct ones).

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

Adding to 20012323311 its reverse (11332321002), we get a palindrome (31344644313).

The spelling of 20012323311 in words is "twenty billion, twelve million, three hundred twenty-three thousand, three hundred eleven".