18924646068 has 144 divisors (see below), whose sum is σ = 50124582144. Its totient is φ = 6015651840.

The previous prime is 18924645997. The next prime is 18924646093. The reversal of 18924646068 is 86064642981.

18924646068 is a `hidden beast` number, since 1 + 8 + 9 + 24 + 6 + 4 + 606 + 8 = 666.

It is a super-3 number, since 3×18924646068³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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, 10995448 + ... + 10997168.

It is an arithmetic number, because the mean of its divisors is an integer number (348087376).

Almost surely, 2^18924646068 is an apocalyptic number.

18924646068 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 18924646068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25062291072).

18924646068 is an abundant number, since it is smaller than the sum of its proper divisors (31199936076).

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

18924646068 is a wasteful number, since it uses less digits than its factorization.

18924646068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942 (or 1937 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 18924646068 in words is "eighteen billion, nine hundred twenty-four million, six hundred forty-six thousand, sixty-eight".