18996568227840 has 1024 divisors, whose sum is σ = 71896655462400. Its totient is φ = 4193072971776.

The previous prime is 18996568227821. The next prime is 18996568227869. The reversal of 18996568227840 is 4872286569981.

It is a tau number, because it is divible by the number of its divisors (1024).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12775095577 + ... + 12775097063.

It is an arithmetic number, because the mean of its divisors is an integer number (70211577600).

Almost surely, 2^{18996568227840} is an apocalyptic number.

18996568227840 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 18996568227840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35948327731200).

18996568227840 is an abundant number, since it is smaller than the sum of its proper divisors (52900087234560).

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

18996568227840 is an equidigital number, since it uses as much as digits as its factorization.

18996568227840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 836075520, while the sum is 75.

The spelling of 18996568227840 in words is "eighteen trillion, nine hundred ninety-six billion, five hundred sixty-eight million, two hundred twenty-seven thousand, eight hundred forty".