18393661439995 has 16 divisors (see below), whose sum is σ = 22195774036800. Its totient is φ = 14632686115200.

The previous prime is 18393661439983. The next prime is 18393661440001. The reversal of 18393661439995 is 59993416639381.

It is not a de Polignac number, because 18393661439995 - 2¹⁵ = 18393661407227 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13533781 + ... + 14830729.

It is an arithmetic number, because the mean of its divisors is an integer number (1387235877300).

Almost surely, 2^{18393661439995} is an apocalyptic number.

18393661439995 is a deficient number, since it is larger than the sum of its proper divisors (3802112596805).

18393661439995 is a wasteful number, since it uses less digits than its factorization.

18393661439995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312806.

The product of its digits is 1020366720, while the sum is 76.

The spelling of 18393661439995 in words is "eighteen trillion, three hundred ninety-three billion, six hundred sixty-one million, four hundred thirty-nine thousand, nine hundred ninety-five".