18240993567 has 12 divisors (see below), whose sum is σ = 27734844280. Its totient is φ = 11520627408.

The previous prime is 18240993559. The next prime is 18240993569. The reversal of 18240993567 is 76539904281.

18240993567 is a `hidden beast` number, since 182 + 409 + 9 + 3 + 56 + 7 = 666.

It is not a de Polignac number, because 18240993567 - 2³ = 18240993559 is a prime.

It is a super-2 number, since 2×18240993567² (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 (18240993569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53336068 + ... + 53336409.

It is a 1-persistent number, because it is pandigital, but 2⋅18240993567 = 36481987134 is not.

Almost surely, 2^18240993567 is an apocalyptic number.

18240993567 is a deficient number, since it is larger than the sum of its proper divisors (9493850713).

18240993567 is a wasteful number, since it uses less digits than its factorization.

18240993567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106672502 (or 106672499 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 18240993567 in words is "eighteen billion, two hundred forty million, nine hundred ninety-three thousand, five hundred sixty-seven".