18273963998 has 8 divisors (see below), whose sum is σ = 27415119600. Its totient is φ = 9135590800.

The previous prime is 18273963973. The next prime is 18273964019. The reversal of 18273963998 is 89936937281.

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, 679103 + ... + 705498.

It is an arithmetic number, because the mean of its divisors is an integer number (3426889950).

Almost surely, 2^18273963998 is an apocalyptic number.

18273963998 is a deficient number, since it is larger than the sum of its proper divisors (9141155602).

18273963998 is a wasteful number, since it uses less digits than its factorization.

18273963998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391202.

The product of its digits is 35271936, while the sum is 65.

The spelling of 18273963998 in words is "eighteen billion, two hundred seventy-three million, nine hundred sixty-three thousand, nine hundred ninety-eight".