18916110409 has 16 divisors (see below), whose sum is σ = 23885307648. Its totient is φ = 14596572672.

The previous prime is 18916110403. The next prime is 18916110413. The reversal of 18916110409 is 90401161981.

It is a cyclic number.

It is not a de Polignac number, because 18916110409 - 2⁷ = 18916110281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18916110403) 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, 3452892 + ... + 3458365.

It is an arithmetic number, because the mean of its divisors is an integer number (1492831728).

Almost surely, 2^18916110409 is an apocalyptic number.

It is an amenable number.

18916110409 is a deficient number, since it is larger than the sum of its proper divisors (4969197239).

18916110409 is a wasteful number, since it uses less digits than its factorization.

18916110409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6911304.

The product of its (nonzero) digits is 15552, while the sum is 40.

The spelling of 18916110409 in words is "eighteen billion, nine hundred sixteen million, one hundred ten thousand, four hundred nine".