20420132313 has 16 divisors (see below), whose sum is σ = 31120075136. Its totient is φ = 11667265920.

The previous prime is 20420132303. The next prime is 20420132351. The reversal of 20420132313 is 31323102402.

It is not a de Polignac number, because 20420132313 - 2⁵ = 20420132281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20420132313.

It is not an unprimeable number, because it can be changed into a prime (20420132303) 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 15 ways as a sum of consecutive naturals, for example, 139845 + ... + 245757.

It is an arithmetic number, because the mean of its divisors is an integer number (1945004696).

Almost surely, 2^20420132313 is an apocalyptic number.

It is an amenable number.

20420132313 is a deficient number, since it is larger than the sum of its proper divisors (10699942823).

20420132313 is a wasteful number, since it uses less digits than its factorization.

20420132313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115104.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20420132313 its reverse (31323102402), we get a palindrome (51743234715).

The spelling of 20420132313 in words is "twenty billion, four hundred twenty million, one hundred thirty-two thousand, three hundred thirteen".