20842306513 has 8 divisors (see below), whose sum is σ = 23866580160. Its totient is φ = 17829733200.

The previous prime is 20842306501. The next prime is 20842306553. The reversal of 20842306513 is 31560324802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20842306513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20842306553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2921263 + ... + 2928388.

It is an arithmetic number, because the mean of its divisors is an integer number (2983322520).

Almost surely, 2^20842306513 is an apocalyptic number.

It is an amenable number.

20842306513 is a deficient number, since it is larger than the sum of its proper divisors (3024273647).

20842306513 is an equidigital number, since it uses as much as digits as its factorization.

20842306513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850167.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 20842306513 in words is "twenty billion, eight hundred forty-two million, three hundred six thousand, five hundred thirteen".