18366834489 has 8 divisors (see below), whose sum is σ = 24544394592. Its totient is φ = 12216915360.

The previous prime is 18366834407. The next prime is 18366834533. The reversal of 18366834489 is 98443866381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18366834489 - 2¹¹ = 18366832441 is a prime.

It is a super-2 number, since 2×18366834489² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18366839489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6908692 + ... + 6911349.

It is an arithmetic number, because the mean of its divisors is an integer number (3068049324).

Almost surely, 2^18366834489 is an apocalyptic number.

It is an amenable number.

18366834489 is a deficient number, since it is larger than the sum of its proper divisors (6177560103).

18366834489 is a wasteful number, since it uses less digits than its factorization.

18366834489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13820487.

The product of its digits is 23887872, while the sum is 60.

The spelling of 18366834489 in words is "eighteen billion, three hundred sixty-six million, eight hundred thirty-four thousand, four hundred eighty-nine".