20533005313 has 4 divisors (see below), whose sum is σ = 20533292208. Its totient is φ = 20532718420.

The previous prime is 20533005307. The next prime is 20533005319. The reversal of 20533005313 is 31350033502.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (20533005307) and next prime (20533005319).

It is a cyclic number.

It is not a de Polignac number, because 20533005313 - 2²⁹ = 19996134401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20533005319) 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, 61770 + ... + 211852.

It is an arithmetic number, because the mean of its divisors is an integer number (5133323052).

Almost surely, 2^20533005313 is an apocalyptic number.

It is an amenable number.

20533005313 is a deficient number, since it is larger than the sum of its proper divisors (286895).

20533005313 is a wasteful number, since it uses less digits than its factorization.

20533005313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286894.

The product of its (nonzero) digits is 4050, while the sum is 25.

Adding to 20533005313 its reverse (31350033502), we get a palindrome (51883038815).

The spelling of 20533005313 in words is "twenty billion, five hundred thirty-three million, five thousand, three hundred thirteen".