18842899824 has 240 divisors, whose sum is σ = 65117707200. Its totient is φ = 5066772480.

The previous prime is 18842899819. The next prime is 18842899871. The reversal of 18842899824 is 42899824881.

18842899824 is a `hidden beast` number, since 188 + 428 + 9 + 9 + 8 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 14.

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, 828444 + ... + 850884.

It is an arithmetic number, because the mean of its divisors is an integer number (271323780).

Almost surely, 2^18842899824 is an apocalyptic number.

18842899824 is a gapful number since it is divisible by the number (14) 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 18842899824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32558853600).

18842899824 is an abundant number, since it is smaller than the sum of its proper divisors (46274807376).

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

18842899824 is a wasteful number, since it uses less digits than its factorization.

18842899824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22493 (or 22470 counting only the distinct ones).

The product of its digits is 21233664, while the sum is 63.

The spelling of 18842899824 in words is "eighteen billion, eight hundred forty-two million, eight hundred ninety-nine thousand, eight hundred twenty-four".