18668335336837 has 4 divisors (see below), whose sum is σ = 18669563612800. Its totient is φ = 18667107060876.

The previous prime is 18668335336831. The next prime is 18668335336853. The reversal of 18668335336837 is 73863353386681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18668335336837 - 2²⁷ = 18668201119109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18668335336831) 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, 614115183 + ... + 614145580.

It is an arithmetic number, because the mean of its divisors is an integer number (4667390903200).

Almost surely, 2^{18668335336837} is an apocalyptic number.

It is an amenable number.

18668335336837 is a deficient number, since it is larger than the sum of its proper divisors (1228275963).

18668335336837 is a wasteful number, since it uses less digits than its factorization.

18668335336837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228275962.

The product of its digits is 940584960, while the sum is 70.

The spelling of 18668335336837 in words is "eighteen trillion, six hundred sixty-eight billion, three hundred thirty-five million, three hundred thirty-six thousand, eight hundred thirty-seven".