18648198432 has 240 divisors, whose sum is σ = 57981147840. Its totient is φ = 5863352832.

The previous prime is 18648198421. The next prime is 18648198463. The reversal of 18648198432 is 23489184681.

It is a happy number.

18648198432 is a `hidden beast` number, since 1 + 86 + 48 + 1 + 98 + 432 = 666.

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13641013 + ... + 13642379.

It is an arithmetic number, because the mean of its divisors is an integer number (241588116).

Almost surely, 2^18648198432 is an apocalyptic number.

18648198432 is a gapful number since it is divisible by the number (12) 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 18648198432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28990573920).

18648198432 is an abundant number, since it is smaller than the sum of its proper divisors (39332949408).

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

18648198432 is a wasteful number, since it uses less digits than its factorization.

18648198432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1668 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 18648198432 in words is "eighteen billion, six hundred forty-eight million, one hundred ninety-eight thousand, four hundred thirty-two".