20123013331 has 4 divisors (see below), whose sum is σ = 20157295032. Its totient is φ = 20088731632.

The previous prime is 20123013301. The next prime is 20123013343. The reversal of 20123013331 is 13331032102.

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 20123013331 - 2¹³ = 20123005139 is a prime.

It is a super-2 number, since 2×20123013331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123013299 and 20123013308.

It is not an unprimeable number, because it can be changed into a prime (20123013301) 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, 17139970 + ... + 17141143.

It is an arithmetic number, because the mean of its divisors is an integer number (5039323758).

Almost surely, 2^20123013331 is an apocalyptic number.

20123013331 is a deficient number, since it is larger than the sum of its proper divisors (34281701).

20123013331 is an equidigital number, since it uses as much as digits as its factorization.

20123013331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34281700.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20123013331 its reverse (13331032102), we get a palindrome (33454045433).

The spelling of 20123013331 in words is "twenty billion, one hundred twenty-three million, thirteen thousand, three hundred thirty-one".