18838064337566 has 4 divisors (see below), whose sum is σ = 28257096506352. Its totient is φ = 9419032168782.

The previous prime is 18838064337551. The next prime is 18838064337569. The reversal of 18838064337566 is 66573346083881.

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

It is a junction number, because it is equal to n+sod(n) for n = 18838064337496 and 18838064337505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18838064337569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4709516084390 + ... + 4709516084393.

It is an arithmetic number, because the mean of its divisors is an integer number (7064274126588).

Almost surely, 2^{18838064337566} is an apocalyptic number.

18838064337566 is a deficient number, since it is larger than the sum of its proper divisors (9419032168786).

18838064337566 is an equidigital number, since it uses as much as digits as its factorization.

18838064337566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9419032168785.

The product of its (nonzero) digits is 418037760, while the sum is 68.

The spelling of 18838064337566 in words is "eighteen trillion, eight hundred thirty-eight billion, sixty-four million, three hundred thirty-seven thousand, five hundred sixty-six".