16930578493 has 4 divisors (see below), whose sum is σ = 16930905628. Its totient is φ = 16930251360.

The previous prime is 16930578473. The next prime is 16930578517. The reversal of 16930578493 is 39487503961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39487503961 = 467 ⋅84555683.

It can be written as a sum of positive squares in 2 ways, for example, as 6726952324 + 10203626169 = 82018^2 + 101013^2 .

It is a cyclic number.

It is not a de Polignac number, because 16930578493 - 2⁹ = 16930577981 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 (16930578473) 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, 66888 + ... + 195793.

It is an arithmetic number, because the mean of its divisors is an integer number (4232726407).

Almost surely, 2^16930578493 is an apocalyptic number.

It is an amenable number.

16930578493 is a deficient number, since it is larger than the sum of its proper divisors (327135).

16930578493 is an equidigital number, since it uses as much as digits as its factorization.

16930578493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327134.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 16930578493 in words is "sixteen billion, nine hundred thirty million, five hundred seventy-eight thousand, four hundred ninety-three".