18654045681 has 8 divisors (see below), whose sum is σ = 24876154080. Its totient is φ = 12433983872.

The previous prime is 18654045671. The next prime is 18654045727.

18654045681 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 18654045681 - 2¹³ = 18654037489 is a prime.

It is a super-3 number, since 3×18654045681³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 18654045681.

It is not an unprimeable number, because it can be changed into a prime (18654045601) 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, 490251 + ... + 526928.

It is an arithmetic number, because the mean of its divisors is an integer number (3109519260).

Almost surely, 2^18654045681 is an apocalyptic number.

It is an amenable number.

18654045681 is a deficient number, since it is larger than the sum of its proper divisors (6222108399).

18654045681 is a wasteful number, since it uses less digits than its factorization.

18654045681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023295.

The product of its (nonzero) digits is 921600, while the sum is 48.

It can be divided in two parts, 186540 and 45681, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 18654045681 in words is "eighteen billion, six hundred fifty-four million, forty-five thousand, six hundred eighty-one".