13456920493 has 4 divisors (see below), whose sum is σ = 13785138108. Its totient is φ = 13128702880.

The previous prime is 13456920467. The next prime is 13456920497. The reversal of 13456920493 is 39402965431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39402965431 = 31 ⋅1271063401.

It can be written as a sum of positive squares in 2 ways, for example, as 6008885289 + 7448035204 = 77517^2 + 86302^2 .

It is a cyclic number.

It is not a de Polignac number, because 13456920493 - 2⁹ = 13456919981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13456920497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164108746 + ... + 164108827.

It is an arithmetic number, because the mean of its divisors is an integer number (3446284527).

Almost surely, 2^13456920493 is an apocalyptic number.

It is an amenable number.

13456920493 is a deficient number, since it is larger than the sum of its proper divisors (328217615).

13456920493 is an equidigital number, since it uses as much as digits as its factorization.

13456920493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328217614.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 13456920493 in words is "thirteen billion, four hundred fifty-six million, nine hundred twenty thousand, four hundred ninety-three".