20673487513 has 16 divisors (see below), whose sum is σ = 23868632320. Its totient is φ = 17538970176.

The previous prime is 20673487511. The next prime is 20673487531. The reversal of 20673487513 is 31578437602.

It is a happy number.

It is not a de Polignac number, because 20673487513 - 2¹ = 20673487511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20673487511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1629631 + ... + 1642267.

It is an arithmetic number, because the mean of its divisors is an integer number (1491789520).

Almost surely, 2^20673487513 is an apocalyptic number.

It is an amenable number.

20673487513 is a deficient number, since it is larger than the sum of its proper divisors (3195144807).

20673487513 is a wasteful number, since it uses less digits than its factorization.

20673487513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15016.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 20673487513 in words is "twenty billion, six hundred seventy-three million, four hundred eighty-seven thousand, five hundred thirteen".