18542166668 has 6 divisors (see below), whose sum is σ = 32448791676. Its totient is φ = 9271083332.

The previous prime is 18542166661. The next prime is 18542166673. The reversal of 18542166668 is 86666124581.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18542166661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2317770830 + ... + 2317770837.

It is an arithmetic number, because the mean of its divisors is an integer number (5408131946).

Almost surely, 2^18542166668 is an apocalyptic number.

It is an amenable number.

18542166668 is a deficient number, since it is larger than the sum of its proper divisors (13906625008).

18542166668 is a wasteful number, since it uses less digits than its factorization.

18542166668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635541671 (or 4635541669 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 53.

The spelling of 18542166668 in words is "eighteen billion, five hundred forty-two million, one hundred sixty-six thousand, six hundred sixty-eight".