18963797998 has 16 divisors (see below), whose sum is σ = 28911381840. Its totient is φ = 9327752896.

The previous prime is 18963797981. The next prime is 18963798023. The reversal of 18963797998 is 89979736981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235336 + ... + 305467.

It is an arithmetic number, because the mean of its divisors is an integer number (1806961365).

Almost surely, 2^18963797998 is an apocalyptic number.

18963797998 is a deficient number, since it is larger than the sum of its proper divisors (9947583842).

18963797998 is a wasteful number, since it uses less digits than its factorization.

18963797998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541091.

The product of its digits is 370355328, while the sum is 76.

The spelling of 18963797998 in words is "eighteen billion, nine hundred sixty-three million, seven hundred ninety-seven thousand, nine hundred ninety-eight".