16693242521418 has 64 divisors (see below), whose sum is σ = 37654686971520. Its totient is φ = 5480647007616.

The previous prime is 16693242521383. The next prime is 16693242521467. The reversal of 16693242521418 is 81412524239661.

16693242521418 is a `hidden beast` number, since 1 + 6 + 6 + 9 + 32 + 42 + 521 + 41 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27752796 + ... + 28347912.

It is an arithmetic number, because the mean of its divisors is an integer number (588354483930).

Almost surely, 2^{16693242521418} is an apocalyptic number.

16693242521418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16693242521418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18827343485760).

16693242521418 is an abundant number, since it is smaller than the sum of its proper divisors (20961444450102).

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

16693242521418 is a wasteful number, since it uses less digits than its factorization.

16693242521418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602948 (or 602942 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 16693242521418 in words is "sixteen trillion, six hundred ninety-three billion, two hundred forty-two million, five hundred twenty-one thousand, four hundred eighteen".