18969618301812 has 144 divisors (see below), whose sum is σ = 50456106792000. Its totient is φ = 6000391369728.

The previous prime is 18969618301787. The next prime is 18969618301847. The reversal of 18969618301812 is 21810381696981.

18969618301812 is a `hidden beast` number, since 1 + 8 + 9 + 6 + 9 + 618 + 3 + 0 + 1 + 8 + 1 + 2 = 666.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18969618301812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308503623 + ... + 308565105.

It is an arithmetic number, because the mean of its divisors is an integer number (350389630500).

Almost surely, 2^{18969618301812} is an apocalyptic number.

18969618301812 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 18969618301812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25228053396000).

18969618301812 is an abundant number, since it is smaller than the sum of its proper divisors (31486488490188).

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

18969618301812 is a wasteful number, since it uses less digits than its factorization.

18969618301812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66590 (or 66585 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The spelling of 18969618301812 in words is "eighteen trillion, nine hundred sixty-nine billion, six hundred eighteen million, three hundred one thousand, eight hundred twelve".