18894668541 has 64 divisors (see below), whose sum is σ = 30713210880. Its totient is φ = 10092625920.

The previous prime is 18894668537. The next prime is 18894668543. The reversal of 18894668541 is 14586649881.

It is a happy number.

It is not a de Polignac number, because 18894668541 - 2² = 18894668537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18894668543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10086981 + ... + 10088853.

It is an arithmetic number, because the mean of its divisors is an integer number (479893920).

Almost surely, 2^18894668541 is an apocalyptic number.

It is an amenable number.

18894668541 is a deficient number, since it is larger than the sum of its proper divisors (11818542339).

18894668541 is a wasteful number, since it uses less digits than its factorization.

18894668541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226.

The product of its digits is 13271040, while the sum is 60.

The spelling of 18894668541 in words is "eighteen billion, eight hundred ninety-four million, six hundred sixty-eight thousand, five hundred forty-one".