18662399998 has 8 divisors (see below), whose sum is σ = 30538472760. Its totient is φ = 8482909080.

The previous prime is 18662399983. The next prime is 18662400007. The reversal of 18662399998 is 89999326681.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424145433 + ... + 424145476.

It is an arithmetic number, because the mean of its divisors is an integer number (3817309095).

Almost surely, 2^18662399998 is an apocalyptic number.

18662399998 is a deficient number, since it is larger than the sum of its proper divisors (11876072762).

18662399998 is a wasteful number, since it uses less digits than its factorization.

18662399998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848290922.

The product of its digits is 90699264, while the sum is 70.

The spelling of 18662399998 in words is "eighteen billion, six hundred sixty-two million, three hundred ninety-nine thousand, nine hundred ninety-eight".