18642893798 has 8 divisors (see below), whose sum is σ = 27986950992. Its totient is φ = 9313910136.

The previous prime is 18642893791. The next prime is 18642893831. The reversal of 18642893798 is 89739824681.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18642893791) 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, 3765290 + ... + 3770237.

It is an arithmetic number, because the mean of its divisors is an integer number (3498368874).

Almost surely, 2^18642893798 is an apocalyptic number.

18642893798 is a deficient number, since it is larger than the sum of its proper divisors (9344057194).

18642893798 is a wasteful number, since it uses less digits than its factorization.

18642893798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7536766.

The product of its digits is 41803776, while the sum is 65.

The spelling of 18642893798 in words is "eighteen billion, six hundred forty-two million, eight hundred ninety-three thousand, seven hundred ninety-eight".