33144420013 has 4 divisors (see below), whose sum is σ = 33201863260. Its totient is φ = 33086976768.

The previous prime is 33144419999. The next prime is 33144420041. The reversal of 33144420013 is 31002444133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31002444133 = 31 ⋅1000078843.

It can be written as a sum of positive squares in 2 ways, for example, as 32796485604 + 347934409 = 181098^2 + 18653^2 .

It is a cyclic number.

It is not a de Polignac number, because 33144420013 - 2⁵ = 33144419981 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 33144420013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33144420053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28720758 + ... + 28721911.

It is an arithmetic number, because the mean of its divisors is an integer number (8300465815).

Almost surely, 2^33144420013 is an apocalyptic number.

It is an amenable number.

33144420013 is a deficient number, since it is larger than the sum of its proper divisors (57443247).

33144420013 is an equidigital number, since it uses as much as digits as its factorization.

33144420013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57443246.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 33144420013 its reverse (31002444133), we get a palindrome (64146864146).

The spelling of 33144420013 in words is "thirty-three billion, one hundred forty-four million, four hundred twenty thousand, thirteen".