18709775263368 has 384 divisors, whose sum is σ = 62472309350400. Its totient is φ = 5167794038400.

The previous prime is 18709775263327. The next prime is 18709775263393. The reversal of 18709775263368 is 86336257790781.

18709775263368 is a `hidden beast` number, since 1 + 8 + 7 + 0 + 9 + 7 + 7 + 526 + 33 + 68 = 666.

It is a super-2 number, since 2×18709775263368² (a number of 27 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 18709775263296 and 18709775263305.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 318559621 + ... + 318618347.

It is an arithmetic number, because the mean of its divisors is an integer number (162688305600).

Almost surely, 2^{18709775263368} is an apocalyptic number.

18709775263368 is a gapful number since it is divisible by the number (18) 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 18709775263368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31236154675200).

18709775263368 is an abundant number, since it is smaller than the sum of its proper divisors (43762534087032).

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

18709775263368 is a wasteful number, since it uses less digits than its factorization.

18709775263368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59758 (or 59741 counting only the distinct ones).

The product of its (nonzero) digits is 640120320, while the sum is 72.

The spelling of 18709775263368 in words is "eighteen trillion, seven hundred nine billion, seven hundred seventy-five million, two hundred sixty-three thousand, three hundred sixty-eight".