18764345920205 has 8 divisors (see below), whose sum is σ = 23702331688800. Its totient is φ = 14221399013136.

The previous prime is 18764345920163. The next prime is 18764345920211. The reversal of 18764345920205 is 50202954346781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18764345920205 - 2¹² = 18764345916109 is a prime.

It is a super-2 number, since 2×18764345920205² (a number of 27 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 98759715275 + ... + 98759715464.

It is an arithmetic number, because the mean of its divisors is an integer number (2962791461100).

It is a 2-persistent number, because it is pandigital, and so is 2⋅18764345920205 = 37528691840410, but 3⋅18764345920205 = 56293037760615 is not.

Almost surely, 2^{18764345920205} is an apocalyptic number.

It is an amenable number.

18764345920205 is a deficient number, since it is larger than the sum of its proper divisors (4937985768595).

18764345920205 is a wasteful number, since it uses less digits than its factorization.

18764345920205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197519430763.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 18764345920205 in words is "eighteen trillion, seven hundred sixty-four billion, three hundred forty-five million, nine hundred twenty thousand, two hundred five".