16932578393 has 4 divisors (see below), whose sum is σ = 16934321460. Its totient is φ = 16930835328.

The previous prime is 16932578389. The next prime is 16932578437. The reversal of 16932578393 is 39387523961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39387523961 = 89 ⋅442556449.

It can be written as a sum of positive squares in 2 ways, for example, as 8113865929 + 8818712464 = 90077^2 + 93908^2 .

It is a cyclic number.

It is not a de Polignac number, because 16932578393 - 2² = 16932578389 is a prime.

It is a super-2 number, since 2×16932578393² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16902578393) 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, 856880 + ... + 876417.

It is an arithmetic number, because the mean of its divisors is an integer number (4233580365).

Almost surely, 2^16932578393 is an apocalyptic number.

It is an amenable number.

16932578393 is a deficient number, since it is larger than the sum of its proper divisors (1743067).

16932578393 is an equidigital number, since it uses as much as digits as its factorization.

16932578393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743066.

The product of its digits is 7348320, while the sum is 56.

The spelling of 16932578393 in words is "sixteen billion, nine hundred thirty-two million, five hundred seventy-eight thousand, three hundred ninety-three".