18139321970399 has 8 divisors (see below), whose sum is σ = 20735911296000. Its totient is φ = 15544047048696.

The previous prime is 18139321970383. The next prime is 18139321970437. The reversal of 18139321970399 is 99307912393181.

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 18139321970399 - 2⁴ = 18139321970383 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 (18139321970999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328571399 + ... + 328626600.

It is an arithmetic number, because the mean of its divisors is an integer number (2591988912000).

Almost surely, 2^{18139321970399} is an apocalyptic number.

18139321970399 is a deficient number, since it is larger than the sum of its proper divisors (2596589325601).

18139321970399 is an equidigital number, since it uses as much as digits as its factorization.

18139321970399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657201949.

The product of its (nonzero) digits is 19840464, while the sum is 65.

The spelling of 18139321970399 in words is "eighteen trillion, one hundred thirty-nine billion, three hundred twenty-one million, nine hundred seventy thousand, three hundred ninety-nine".