13128047493 has 32 divisors (see below), whose sum is σ = 19861991424. Its totient is φ = 7640880000.

The previous prime is 13128047489. The next prime is 13128047519. The reversal of 13128047493 is 39474082131.

It is not a de Polignac number, because 13128047493 - 2² = 13128047489 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128047453) 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, 85033 + ... + 182993.

It is an arithmetic number, because the mean of its divisors is an integer number (620687232).

Almost surely, 2^13128047493 is an apocalyptic number.

It is an amenable number.

13128047493 is a deficient number, since it is larger than the sum of its proper divisors (6733943931).

13128047493 is a wasteful number, since it uses less digits than its factorization.

13128047493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98137.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 13128047493 in words is "thirteen billion, one hundred twenty-eight million, forty-seven thousand, four hundred ninety-three".