20313120133 has 4 divisors (see below), whose sum is σ = 20374489408. Its totient is φ = 20251750860.

The previous prime is 20313120131. The next prime is 20313120161. The reversal of 20313120133 is 33102131302.

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 not a de Polignac number, because 20313120133 - 2¹ = 20313120131 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 20313120133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313120131) 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, 30684141 + ... + 30684802.

It is an arithmetic number, because the mean of its divisors is an integer number (5093622352).

Almost surely, 2^20313120133 is an apocalyptic number.

It is an amenable number.

20313120133 is a deficient number, since it is larger than the sum of its proper divisors (61369275).

20313120133 is an equidigital number, since it uses as much as digits as its factorization.

20313120133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61369274.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20313120133 its reverse (33102131302), we get a palindrome (53415251435).

The spelling of 20313120133 in words is "twenty billion, three hundred thirteen million, one hundred twenty thousand, one hundred thirty-three".