18723299838894 has 192 divisors, whose sum is σ = 49814346816000. Its totient is φ = 4963532463360.

The previous prime is 18723299838829. The next prime is 18723299838931. The reversal of 18723299838894 is 49883899232781.

18723299838894 is a `hidden beast` number, since 187 + 2 + 329 + 9 + 8 + 38 + 89 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 37748784 + ... + 38241564.

It is an arithmetic number, because the mean of its divisors is an integer number (259449723000).

Almost surely, 2^{18723299838894} is an apocalyptic number.

18723299838894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18723299838894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24907173408000).

18723299838894 is an abundant number, since it is smaller than the sum of its proper divisors (31091046977106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18723299838894 is a wasteful number, since it uses less digits than its factorization.

18723299838894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493143 (or 493140 counting only the distinct ones).

The product of its digits is 3009871872, while the sum is 81.

The spelling of 18723299838894 in words is "eighteen trillion, seven hundred twenty-three billion, two hundred ninety-nine million, eight hundred thirty-eight thousand, eight hundred ninety-four".