18888973843 has 4 divisors (see below), whose sum is σ = 19075993488. Its totient is φ = 18701954200.

The previous prime is 18888973793. The next prime is 18888973871. The reversal of 18888973843 is 34837988881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18888973843 - 2⁹ = 18888973331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18888373843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93509671 + ... + 93509872.

It is an arithmetic number, because the mean of its divisors is an integer number (4768998372).

Almost surely, 2^18888973843 is an apocalyptic number.

18888973843 is a deficient number, since it is larger than the sum of its proper divisors (187019645).

18888973843 is a wasteful number, since it uses less digits than its factorization.

18888973843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187019644.

The product of its digits is 74317824, while the sum is 67.

The spelling of 18888973843 in words is "eighteen billion, eight hundred eighty-eight million, nine hundred seventy-three thousand, eight hundred forty-three".