18388069519 has 16 divisors (see below), whose sum is σ = 18784610208. Its totient is φ = 17996378112.

The previous prime is 18388069517. The next prime is 18388069573. The reversal of 18388069519 is 91596088381.

It is a cyclic number.

It is not a de Polignac number, because 18388069519 - 2¹ = 18388069517 is a prime.

It is a super-2 number, since 2×18388069519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18388069517) 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, 7606599 + ... + 7609015.

It is an arithmetic number, because the mean of its divisors is an integer number (1174038138).

Almost surely, 2^18388069519 is an apocalyptic number.

18388069519 is a deficient number, since it is larger than the sum of its proper divisors (396540689).

18388069519 is a wasteful number, since it uses less digits than its factorization.

18388069519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354.

The product of its (nonzero) digits is 3732480, while the sum is 58.

The spelling of 18388069519 in words is "eighteen billion, three hundred eighty-eight million, sixty-nine thousand, five hundred nineteen".