18899718795936 has 288 divisors, whose sum is σ = 61289584312320. Its totient is φ = 5472279820800.

The previous prime is 18899718795917. The next prime is 18899718795983. The reversal of 18899718795936 is 63959781799881.

18899718795936 is a `hidden beast` number, since 1 + 8 + 8 + 9 + 9 + 7 + 1 + 8 + 7 + 9 + 593 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×18899718795936² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6540421 + ... + 8976443.

It is an arithmetic number, because the mean of its divisors is an integer number (212811056640).

Almost surely, 2^{18899718795936} is an apocalyptic number.

18899718795936 is a gapful number since it is divisible by the number (16) 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 18899718795936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30644792156160).

18899718795936 is an abundant number, since it is smaller than the sum of its proper divisors (42389865516384).

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

18899718795936 is a wasteful number, since it uses less digits than its factorization.

18899718795936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436160 (or 2436149 counting only the distinct ones).

The product of its digits is 14814213120, while the sum is 90.

The spelling of 18899718795936 in words is "eighteen trillion, eight hundred ninety-nine billion, seven hundred eighteen million, seven hundred ninety-five thousand, nine hundred thirty-six".