18738242798 has 16 divisors (see below), whose sum is σ = 30668281776. Its totient is φ = 8515799040.

The previous prime is 18738242797. The next prime is 18738242821. The reversal of 18738242798 is 89724283781.

It is a super-2 number, since 2×18738242798² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18738242797) by changing a digit.

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, 46190 + ... + 199022.

It is an arithmetic number, because the mean of its divisors is an integer number (1916767611).

Almost surely, 2^18738242798 is an apocalyptic number.

18738242798 is a deficient number, since it is larger than the sum of its proper divisors (11930038978).

18738242798 is a wasteful number, since it uses less digits than its factorization.

18738242798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158419.

The product of its digits is 10838016, while the sum is 59.

The spelling of 18738242798 in words is "eighteen billion, seven hundred thirty-eight million, two hundred forty-two thousand, seven hundred ninety-eight".