20130444433 has 4 divisors (see below), whose sum is σ = 21960484848. Its totient is φ = 18300404020.

The previous prime is 20130444421. The next prime is 20130444443. The reversal of 20130444433 is 33444403102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20130444433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20130444443) 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, 915020191 + ... + 915020212.

It is an arithmetic number, because the mean of its divisors is an integer number (5490121212).

Almost surely, 2^20130444433 is an apocalyptic number.

It is an amenable number.

20130444433 is a deficient number, since it is larger than the sum of its proper divisors (1830040415).

20130444433 is a wasteful number, since it uses less digits than its factorization.

20130444433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830040414.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20130444433 its reverse (33444403102), we get a palindrome (53574847535).

The spelling of 20130444433 in words is "twenty billion, one hundred thirty million, four hundred forty-four thousand, four hundred thirty-three".