20124320313 has 32 divisors (see below), whose sum is σ = 28654894080. Its totient is φ = 12540026880.

The previous prime is 20124320311. The next prime is 20124320329. The reversal of 20124320313 is 31302342102.

It is not a de Polignac number, because 20124320313 - 2¹ = 20124320311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20124320313.

It is not an unprimeable number, because it can be changed into a prime (20124320311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 450073 + ... + 492761.

It is an arithmetic number, because the mean of its divisors is an integer number (895465440).

Almost surely, 2^20124320313 is an apocalyptic number.

It is an amenable number.

20124320313 is a deficient number, since it is larger than the sum of its proper divisors (8530573767).

20124320313 is a wasteful number, since it uses less digits than its factorization.

20124320313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42897.

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

Adding to 20124320313 its reverse (31302342102), we get a palindrome (51426662415).

The spelling of 20124320313 in words is "twenty billion, one hundred twenty-four million, three hundred twenty thousand, three hundred thirteen".