20012333513 has 4 divisors (see below), whose sum is σ = 21189529620. Its totient is φ = 18835137408.

The previous prime is 20012333491. The next prime is 20012333521. The reversal of 20012333513 is 31533321002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7833666064 + 12178667449 = 88508^2 + 110357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012333513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20012333573) 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, 588598028 + ... + 588598061.

It is an arithmetic number, because the mean of its divisors is an integer number (5297382405).

Almost surely, 2^20012333513 is an apocalyptic number.

It is an amenable number.

20012333513 is a deficient number, since it is larger than the sum of its proper divisors (1177196107).

20012333513 is a wasteful number, since it uses less digits than its factorization.

20012333513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177196106.

The product of its (nonzero) digits is 1620, while the sum is 23.

Adding to 20012333513 its reverse (31533321002), we get a palindrome (51545654515).

The spelling of 20012333513 in words is "twenty billion, twelve million, three hundred thirty-three thousand, five hundred thirteen".