33530404013 has 4 divisors (see below), whose sum is σ = 33596279580. Its totient is φ = 33464528448.

The previous prime is 33530404003. The next prime is 33530404021. The reversal of 33530404013 is 31040403533.

It is a happy number.

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 20604305764 + 12926098249 = 143542^2 + 113693^2 .

It is a cyclic number.

It is not a de Polignac number, because 33530404013 - 2³⁴ = 16350534829 is a prime.

It is a super-2 number, since 2×33530404013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33530404003) 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, 32937020 + ... + 32938037.

It is an arithmetic number, because the mean of its divisors is an integer number (8399069895).

Almost surely, 2^33530404013 is an apocalyptic number.

It is an amenable number.

33530404013 is a deficient number, since it is larger than the sum of its proper divisors (65875567).

33530404013 is an equidigital number, since it uses as much as digits as its factorization.

33530404013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65875566.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 33530404013 its reverse (31040403533), we get a palindrome (64570807546).

The spelling of 33530404013 in words is "thirty-three billion, five hundred thirty million, four hundred four thousand, thirteen".