18982221664027 has 4 divisors (see below), whose sum is σ = 18982308276136. Its totient is φ = 18982135051920.

The previous prime is 18982221664019. The next prime is 18982221664079. The reversal of 18982221664027 is 72046612228981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18982221664027 - 2³ = 18982221664019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18982221664097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42976473 + ... + 43415914.

It is an arithmetic number, because the mean of its divisors is an integer number (4745577069034).

Almost surely, 2^{18982221664027} is an apocalyptic number.

18982221664027 is a deficient number, since it is larger than the sum of its proper divisors (86612109).

18982221664027 is an equidigital number, since it uses as much as digits as its factorization.

18982221664027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86612108.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 18982221664027 in words is "eighteen trillion, nine hundred eighty-two billion, two hundred twenty-one million, six hundred sixty-four thousand, twenty-seven".