20013506345 has 32 divisors (see below), whose sum is σ = 28023667200. Its totient is φ = 13715499840.

The previous prime is 20013506339. The next prime is 20013506347. The reversal of 20013506345 is 54360531002.

It is not a de Polignac number, because 20013506345 - 2¹⁰ = 20013505321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20013506347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5522204 + ... + 5525826.

It is an arithmetic number, because the mean of its divisors is an integer number (875739600).

Almost surely, 2^20013506345 is an apocalyptic number.

It is an amenable number.

20013506345 is a deficient number, since it is larger than the sum of its proper divisors (8010160855).

20013506345 is an equidigital number, since it uses as much as digits as its factorization.

20013506345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870 (or 6856 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 20013506345 in words is "twenty billion, thirteen million, five hundred six thousand, three hundred forty-five".