18973299068640 has 1536 divisors, whose sum is σ = 81984729415680. Its totient is φ = 4005996134400.

The previous prime is 18973299068579. The next prime is 18973299068653. The reversal of 18973299068640 is 4686099237981.

18973299068640 is a `hidden beast` number, since 18 + 97 + 329 + 90 + 6 + 86 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1838314680 + ... + 1838325000.

It is an arithmetic number, because the mean of its divisors is an integer number (53375474880).

Almost surely, 2^{18973299068640} is an apocalyptic number.

18973299068640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18973299068640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40992364707840).

18973299068640 is an abundant number, since it is smaller than the sum of its proper divisors (63011430347040).

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

18973299068640 is a wasteful number, since it uses less digits than its factorization.

18973299068640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10473 (or 10459 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 72.

The spelling of 18973299068640 in words is "eighteen trillion, nine hundred seventy-three billion, two hundred ninety-nine million, sixty-eight thousand, six hundred forty".