18353799069840 has 480 divisors, whose sum is σ = 68516631440640. Its totient is φ = 4513836367872.

The previous prime is 18353799069799. The next prime is 18353799069847. The reversal of 18353799069840 is 4896099735381.

18353799069840 is a `hidden beast` number, since 1 + 8 + 3 + 537 + 9 + 9 + 0 + 6 + 9 + 84 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (18353799069847) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 420869317 + ... + 420912923.

It is an arithmetic number, because the mean of its divisors is an integer number (142742982168).

Almost surely, 2^{18353799069840} is an apocalyptic number.

18353799069840 is a gapful number since it is divisible by the number (10) 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 18353799069840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34258315720320).

18353799069840 is an abundant number, since it is smaller than the sum of its proper divisors (50162832370800).

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

18353799069840 is a wasteful number, since it uses less digits than its factorization.

18353799069840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44808 (or 44783 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 72.

The spelling of 18353799069840 in words is "eighteen trillion, three hundred fifty-three billion, seven hundred ninety-nine million, sixty-nine thousand, eight hundred forty".