20413213133 has 4 divisors (see below), whose sum is σ = 20428597440. Its totient is φ = 20397828828.

The previous prime is 20413213109. The next prime is 20413213147. The reversal of 20413213133 is 33131231402.

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-20413213133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20413213099 and 20413213108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413213153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7690163 + ... + 7692816.

It is an arithmetic number, because the mean of its divisors is an integer number (5107149360).

Almost surely, 2^20413213133 is an apocalyptic number.

It is an amenable number.

20413213133 is a deficient number, since it is larger than the sum of its proper divisors (15384307).

20413213133 is a wasteful number, since it uses less digits than its factorization.

20413213133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15384306.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20413213133 its reverse (33131231402), we get a palindrome (53544444535).

The spelling of 20413213133 in words is "twenty billion, four hundred thirteen million, two hundred thirteen thousand, one hundred thirty-three".