18863650364719 has 16 divisors (see below), whose sum is σ = 18920559571200. Its totient is φ = 18806839085056.

The previous prime is 18863650364717. The next prime is 18863650364729. The reversal of 18863650364719 is 91746305636881.

It is a cyclic number.

It is not a de Polignac number, because 18863650364719 - 2¹ = 18863650364717 is a prime.

It is a super-2 number, since 2×18863650364719² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18863650364717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2280142167 + ... + 2280150439.

It is an arithmetic number, because the mean of its divisors is an integer number (1182534973200).

Almost surely, 2^{18863650364719} is an apocalyptic number.

18863650364719 is a deficient number, since it is larger than the sum of its proper divisors (56909206481).

18863650364719 is a wasteful number, since it uses less digits than its factorization.

18863650364719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13394.

The product of its (nonzero) digits is 156764160, while the sum is 67.

The spelling of 18863650364719 in words is "eighteen trillion, eight hundred sixty-three billion, six hundred fifty million, three hundred sixty-four thousand, seven hundred nineteen".